Thread types
We also stock threading tools for many other unusual and rare thread types - or we can produce them at short delivery time - e.g. for
| A | Camera thread, flank angle 60°, DIN 4503, see REBELL catalog page 17.8 |
| ACME | American Trapezoidal Thread Form ACME, flank angle 29°, ANSI B 1.5 – 1977 (z.B. 3/4 – 6 ACME); ACME-C, centralizing, ACME-G, for general purpose |
| AERO | Aero-Thread for aircraft construction, patented for thread inserts, Amerikanisches, flank angle 60° (e.g. 0.5000-12 AERO) |
| AMO | American microscope lens thread, flank angle 55°, ANSI B 1.11 - 1978 (e.g. 0.800-36 AMO) |
| AN | Army Navy Thread, American cylindrical pipe thread of the US armed forces, MS33656, SAE-AS 4395 (e.g. -8AN, corresponds to ¾-16 SAE) |
| ANPT | Aeronautical National Taper Pipe Threads, taper 1:16, for army, fleet and aviation, flank angle 60°, MIL-P-7105 (e.g. ANPT 1/4-18) |
| ANSI | American National Standards Institute - Responsible national institute in the USA for the standardization of industrial processes. (comparable with the German Institute for Standardization DIN) |
| API | American Petroleum Institute Threads, cylindrical and tapered thread for the petroleum industry (mostly with additional letters like TBG, CSG, LP, REG ROTARY etc.), API Std 5 B - 1979 (e.g. 1" API-LP) |
| ART | French, asymmetrical trapezoidal thread (artillery shape), flank angle 45°/3°, NF E 03-611 (e.g. ART 120x8) |
| ASME | American Society of Mechanical Engineers - Professional association of mechanical engineers in the USA, publisher of technical standards, norms and guidelines |
| ASN | Symmetrical trapezoidal thread for aerospace technology, ASN 204 (e.g. 10x2 LH) |
| B | Tripod thread, flank angle 60°, DIN 4503, see REBELL catalog page 17.8 |
| BA | British Association thread, flank angle 47°30', BS 949, see REBELL catalog page 9.12 |
| BC | Japanese and Korean thread for bicycles, flank angle 60°, JIS B 0225, KS B 0226 (e.g. BC 5/16) |
| BeH | Bulgarian tire valve thread, flank angle 60°, BDS 6378-67 (e.g. BeH 5.2) |
| Bi | Bi thread, asymmetrical trapezoidal thread with flank clearance Flank angle 11°/18° (e.g. Bi 6/28 nominal diameter 6 mm, pitch 0.907 = 28 Gg/1") |
| Bl | Metal screw thread ST, flank angle 60°, DIN-EN ISO 1478, see catalog page 18.6 |
| Bodmer | Bodmer thread, historical thread for optical and mechanical instruments, flank angle 50° (e.g. 6 x 30 pitch), developed by Johann Georg Bodmer (1786-1864), Swiss mechanical engineer and inventor |
| Br | Briggs thread, tapered pipe thread, flank angle 60°, taper 1:16, STAS 6422 (e.g. Br 1/4") |
| BSB | British standard Brass thread with constant pitch 26 Gg/1", flank angle 55°, see REBELL catalog page 9.11 |
| BSC | British bicycle thread, flank angle 60°, BS 811, NEN 5516, see REBELL catalog page 18.5 |
| BS Con | British standard conduit thread, BS 949, flank angle 55° (e.g. 1/2 x 18 BS Con) |
| BSF | British Whitworth fine thread, flank angle 55°, BS 949 Part 2, see REBELL catalog page from 9.9 |
| BSF trunc | Whitworth fine thread with shortened flanks, BS 84-1956 (e.g. ½ in.-16 BSF trunc) |
| BSMO | British microscope lens thread, BS 3569, flank angle 55° (e.g. 0.800-36 BSMO) |
| BSP | Whitworth pipe thread (G), flank angle 55°, DIN-ISO 228, see REBELL catalog chapter 10 |
| BSPF | British Standard Pipe Fitting (Fastening) Thread, BS-2779, flank angle 55° (e.g. ½” BSPF) |
| BSPM | British Standard Pipe Mechanical Thread, BS-2779, obsolete British pipe thread, replaced by G ISO 228 |
| BSPP | British Standard Pipe Parallel Thread, Cylindrical Whitworth female pipe thread, flank angle 55°, ISO 7/1, see REBELL catalog page 11.4 |
| BSP.Pl | British Standard Pipe Parallel Thread, Cylindrical Whitworth female pipe thread, flank angle 55°, ISO 7/1 (identical to BSPP) |
| BSPT | British Standard Pipe Taper Thread, tapered Whitworth thread, flank angle 55°, ISO 7/1, see REBELL catalog page 11.5 |
| BS SP | British Standard for Spark Plugs, British spark plug thread, Metric ISO thread form, flank angle 60°, BS 45:1972 (e.g. 14 x 1.25 plug) |
| BSW | British standard Whitworth thread, flank angle 55°, BS 84, see REBELL catalog page from 9.1 |
| BUTT | American National Standard Buttress Inch Screw Thread, ANSI B1.9-1973, flank angle 7°/45° (e.g. 2.5-8 BUTT-2A) |
| Buttress | British buttress thread, BS 1657:1950 (e.g. 2.0 B.S. Buttress 8 tpi) |
| CEI | Cycle Engineers Institute, British bicycle thread, flank angle 60° (precursor thread of BSC) |
| CM | French steel conduit thread, flank angle 80°, NF C 63-021 (e.g. CM 10) |
| C Mount | American National Standard for motion-picture cameras – threaded lens mounts – 16-mm cameras; ANSI/SMPTE 76-1985, flank angle 60° (1-32) |
| CN | Swedish bicycle thread, flank angle 60°, SMS 365 (e.g. CN 9.5-26) |
| CZN | Multi-start metric thread to Carl Zeiss standard CZN 73. basic profile to DIN 13 part 19, flank angle 60° (e.g. M 36 x 7.5 P 0.75 10 starts) |
| D Mount | American National Standard for motion-picture cameras – threaded lens mounts – 8-mm cameras; ANSI/SMPTE 76-1985, flank angle 60° (5/8-32) |
| Dr | Cable release thread DIN 19004 1980-08, flank angle 60°, form A: conical thread taper angle 28° (dimension 3.4 x 0.5), form B: cylindrical thread (M 3.5 x 0.5 - 6H), see REBELL catalog page 17.8 |
| DW | Dywidag thread for prestressed concrete shuttering, flank angle 90° (e.g. DW 15 x 10) |
| E | Electrical (Edison) thread, DIN-EN 60061-1, see REBELL catalog page 17.6 |
| E con | Tapered gas cylinder thread to DIN-EN 144-1, DIN-EN-ISO 11116-1, flank angle 55° (e.g. E 17 con) |
| EG | Insert thread for threaded wire inserts EG-M, EG-MF, EG-UNC, EG-UNF etc., see REBELL catalog chapter 16 |
| Festsitz | Tight-fit thread with transition tolerance zone DIN 13 part 51 (e.g. M10 Sk6, M12 Sn4) (see also MFS) |
| Festsitz PN | Tight fit thread for vehicle construction according to factory standard (e.g. BMW-N11275.0, Mercedes-Daimler-Benz 34310, Porsche-PN 1115) |
| FG | bicycle thread, flank angle 60°, DIN 79012, DIN-ISO 6698, see REBELL catalog page 18.4 |
| FG | HNA fine thread DIN 80101, table AN 100, flank angle 55° (e.g. 1 "FG, 29FG) |
| FPT | Female Pipe Thread, American tapered female pipe thread, taper 1:16, flank angle 60°(e.g. ¼" FPT) - Thread dimensions are identical with NPT |
| F-PTF | Dryseal Fine Taper Pipe Thread, American dry sealing tapered pipe thread, with fine pitch, ANSI B1.20.3-1976 (R 1982), flank angle 60°,(e.g. ¼ - 27 F-PTF) |
| FR | Norwegian Whitworth thread, flank angle 55°, NS 74 (e.g. FR 2") |
| G | Whitworth pipe thread, flank angle 55°, DIN-ISO 228, see REBELL catalog chapter 10 |
| GA | Australian pipe thread, flank angle 55°, AS 1722 (e.g. GA 1/2 / 15) |
| Gaz | French pipe thread, cylindrical, NFE 03-005 (e.g. 1/8-28 Gaz) (Gaz is largely identical to pipe thread G DIN ISO 228) |
| Gf | Freezing pipe thread in mining, for freezing pipes and lye downpipes in freezing shaft construction DIN 4930-2 (e.g. Gf 127) |
| Gg | Rod pipe thread, tapered, for deep drilling technology in wells and mining, DIN 4941 taper 1:16 (e.g. Gg 51), DIN 20314 taper 1:4 (e.g. Gg 4.1/2) |
| GHT | Garden Hose Thread, (e.g. 1.0625-11.5 TPI GHT) |
| Gk | Italian tapered pipe thread, flank angle 55°, taper 1:16, UNI 6124.74 (e.g. Gk 1/2) |
| GL | Round thread for glass containers, DIN 168 (e.g. GL 25 x 3) |
| Glasg | Glass threads for protective glasses and caps, DIN 40450 (e.g. Glasg 74.5) |
| GM | Dutch thread for gas meter, flank angle 55°, NEN 2373 (e.g. GM 3/4) |
| GPI | Glass Packaging Institute Threads, American thread for glass bottles and containers |
| GS | Saw thread for plastic and glass containers DIN 55525 (e.g. GS 22) |
| H | Wood screw thread, flank angle 60°, DIN 7998, see REBELL catalog page 18.7 |
| HA, HB | Thread for bone screws and nuts for surgical implants, DIN 58810 (e.g. HA 4.5, HB 6.5) |
| Hamann | Hamann cartridge thread, historical thread, used on Hamann lathes |
| HK | HK-Piston thread, special thread, flank angle 80° (e.g. HK 4.2) |
| HNA | Fine thread, flank angle 55°, DIN 80101, table AN 100 (e.g. 32FG-HNA) |
| IG | Special thread for containers, wooden barrels, rainwater tanks S60x6, for this purpose connection adapter with thread reduction for connecting pumps, hoses, couplings and ball valves (e.g. IG x ¾" AG) |
| ISA | Historical German thread from 1919, further development of the SI thread and precursor of the DIN profile |
| JG | Special thread JG, flank angle 55° (e.g. JG 26 x 16 Gg/1") |
| KS | Saw thread for plastic containers, flank angle 40°/10°, DIN 6063-1 (e.g. KS 22) |
| KT | Trapezoidal thread for plastic containers, flank angle 20°, DIN 6063-2 (e.g. KT 22) |
| Leica | Leica camera lens thread, flank angle 60°, dimensions: 39 x 0.977, nominal diameter 39 mm, pitch 0.977 = 1/26", flank diameter 38.34 mm, core diameter 37.73 mm |
| LN | Aerospace thread, LN 9163, DIN EN 2158 (e.g. LN 9163 M6-4H5H) |
| Lh | Lionheart thread was used in precision engineering for thread diameters from 1 to 10 mm (VDI thread), flank angle 53°8' (e.g. Lh 6.9 x 0.625) |
| LP | LinePipe, (see API) |
| M | Metric ISO thread, flank angle 60°, DIN 13, see REBELL catalog chapter 3 |
| MF | Metric ISO fine thread, flank angle 60°, DIN 13, see REBELL catalog chapter 4 |
| MF-El | Metric ISO fine thread for electrical installation pipes, flank angle 60°, DIN-EN 60423, see REBELL catalog page 15.6 |
| MFS | Regular and fine thread for interference fit in cast aluminium alloys DIN 8141 : July 1993 (e.g. MFS 12 x 1.5) |
| MJ | Metric aerospace thread MJ, flank angle 60°, with enlarged core radius, DIN-ISO 5855, see REBELL catalog page from 3.41 |
| Mk | Dutch metric tapered external thread, flank angle 60°, taper 1:16, NEN 1988 (e.g. Mk 20x1.5) |
| M keg | Metric tapered thread, taper 1:16, flank angle 60°, DIN 158, see REBELL catalog page 17.5 |
| Mp | Dutch metric tapered female thread, flank angle 60°, taper 1:16, NEN 1988 (e.g. Mp 6) |
| NC | obsolete for UNC |
| NC 5 | Interference-fit thread, American thread for interference fits (tight fit thread), ANSI B1.12-1972, flank angle 60°, cylindrical (e.g. NC 5 HF) |
| NEF | obsolete for UNEF |
| NF | obsolete for UNF |
| Ng, NN | Sewing machine thread Ng, DIN 5309, flank angle 60° (e.g. 3/32 x100 Gg/1"); obsolete: sewing standard 100 (e.g. 11/64" x 40 Gg) |
| NGO | National Gas Outlet Threads, American gas outlet thread, cylindrical, flank angle 60°, ANSI B57.1 (e.g. .885-14 NGO-LH-INT) |
| NGS | National Gas Straight Threads, American National Gas Pipe thread, cylindrical, ANSI CGA V-1, flank angle 60° (e.g. 1/8-27 NGS) |
| NGT | National Gas Taper Threads, American gas pipe thread, tapered, flank angle 60°, taper 1:16, ANSI B 57.1-1977, ANSI CGA V-1 (e.g. 1/8-27 NGT) |
| NH | National Hose Coupling Screw Threads, American thread for hose couplings, cylindrical (fire protection, fire fighting), flank angle 60°, ANSI B 1.20.7, NFPA 194-1974 (e.g. .75-8 NH) |
| NHR | National Standard Hose Coupling Threads for garden hose applications, American pipe thread for garden hose couplings, cylindrical, flank angle 60°, ANSI B2.4 (e.g. .75-11.5 NHR) |
| NHS | Swiss watch thread, flank angle: 50° (profile 1), 60° (profile 2), ASA (e.g. 1.5 x 0.3 NHS) |
| NPS | American Standard Straight Pipe Threads, American cylindrical standard pipe thread, mounting thread for general application, flank angle 60°, ANSI B94.9 -1971, see REBELL catalog page 12.4 |
| NPSC | American Standard Straight Pipe Threads in pipe couplings, American cylindrical standard pipe thread for pipe couplings, flank angle 60°, ANSI/ASME B1.20.1 -1976, see REBELL catalog page 12.5 |
| NPSF | Dryseal American Standard Fuel Internal Straight Pipe Threads, American cylindrical standard pipe thread, dry sealing internal thread for fuel lines, flank angle 60°, ANSI/ASME B1.20.3 -1976, see REBELL catalog page 12.5 |
| NPSH | American Standard Straight Pipe Threads for loose-fitting mechanical joints for hose couplings, American cylindrical standard pipe thread for mechanical connections on hose couplings, flank angle 60°, ANSI/ASME B1.20 -1976, see REBELL catalog page 12.5 |
| NPSI | Dryseal American Standard Intermediate Internal Straight Pipe Threads, American cylindrical standard pipe thread, dry sealing internal thread, flank angle 60°, ANSI/ASME B1.20.3 -1976, see REBELL catalog page 12.5 |
| NPSL | American Standard Straight Pipe Threads for loose-fitting mechanical joints with locknuts, American cylindrical standard pipe thread for mechanical joints with locknuts, flank angle 60°, ANSI/ASME B1.20 -1976, see REBELL catalog page 12.5 |
| NPSM | American Standard Straight Pipe Threads for free-fitting mechanical joints for fixtures, American cylindrical standard pipe thread for mechanical fastenings, flank angle 60°, ANSI/ASME B1.20 -1976, see REBELL catalog page 12.4 |
| NPT | American Standard Taper Pipe Threads, American tapered pipe thread for threads with sealant, flank angle 60°, ANSI B1.20.1, see REBELL catalog chapter 13 |
| NPTF | Dryseal American Standard Taper Pipe Threads, American tapered pipe thread for threads without sealant (dry sealing), flank angle 60°, ANSI B1.20.3, see REBELL catalog chapter 13 |
| NPTR | American Standard Taper Pipe Threads for Railing Joints, American standard pipe thread, tapered, for railing fittings, ANSI/ASME B1.20.1-1983 (e.g. ½ - 14 NPTR) |
| NS | obsolete for UNS |
| ob | Romanian microscope lens thread, flank angle 55°, STAS 6852-81 (whether 4/5" x 1/36") |
| PE | Swiss Whitworth thread, flank angle 55°, SNV 24460 (e.g. 3/16" PE) |
| PF | Korean cylindrical pipe thread, KS B 0221, flank angle 55° (e.g. PF 6 / 1/8) |
| Pg | Steel conduit thread, flank angle 80°, DIN 40430, see REBELL catalog page 15.6 |
| PJ | Parallel Pipe Thread PJ ½" JIS B 0202, Japanese cylindrical pipe thread, flank angle 55 |
| PL | Asymmetrical trapezoidal screw threads of plastic material, Swedish asymmetrical trapezoidal thread for plastic containers, flank angle 30°/4°, (e.g. PL 10 x 3) |
| Pr | Swedish steel conduit thread, SEN 241017, flank angle 80° (e.g. Pr 12.5) |
| PT | Korean tapered pipe thread, KS B 0222, flank angle 55°, taper 1:16 (e.g. PT 6 / 1/8) |
| PTF-SAE- SHORT | Dryseal SAE Short Taper Pipe Threads, American dry sealing SAE pipe thread, tapered, short, ANSI B1.20.3-1976, (R 1982), flank angle 60°, taper 1:16 (e.g. 1/8 - 27 PTF-SAE SHORT) |
| PTF-SPL- SHORT | Dryseal Special Short Taper Pipe Threads, American dry-sealing special pipe thread, tapered, short, ANSI B1.20.3, (R 1982), or according to Swedish standard SMS 1704, 1708 (e.g. 1/8-27 PTF-SPL SHORT) |
| PTF-SPL- Extra Short | Dryseal Special Extra Short Taper Pipe Threads, American dry sealing special pipe thread, tapered, extra short, ANSI B1.20.3-1976, flank angle 60°, taper 1:16 (e.g. 1/8-27 PTF-SPL EXTRA SHORT) |
| R | Tapered Whitworth pipe male thread, taper 1:16, flank angle 55°, DIN 2999, see REBELL catalog page 11.5 |
| Rc | Tapered Whitworth female pipe thread, taper 1:16, flank angle 55°, ISO 7/1, BS 21, see REBELL catalog page 11.5 |
| RC | Australian tapered female pipe thread, AS 1722, flank angle 55°, taper 1:16 (e.g. RC 1.1/2 / 40) |
| Rd | Round thread, flank angle 30°, DIN 405, see REBELL catalog page 15.4 |
| RdG | Danish round thread, DS 199, flank angle 30° (e.g. RdG 60) |
| RMS | Royal Microscopical Society, thread for microscope objectives, flank angle 55° DIN 58888, ISO 8038 (W 0.8 x 36), see REBELL catalog page 17.7Rp |
| Rp | Cylindrical Whitworth female pipe thread, flank angle 55°, DIN 2999, see REBELL catalog page 11.4 |
| S&H | Mechanic standard thread, Siemens & Halske thread, historical telephone thread, developed around 1900 (e.g. thread number 11: outer diameter 8.955 mm, pitch 1.21 mm, flank angle 50°) |
| S | Metric saw thread for general application, DIN 513, flank angle 30°/3°, see REBELL catalog page 18.8 |
| S | Metric saw thread in mining, DIN 20401, flank angle 30°/3°, see REBELL catalog page 18.9 |
| SA | Swiss SA thread, SNV 24462, flank angle 60°, (e.g. SA 8) |
| SAE | Society of Automotive Engineers, American vehicle thread, flank angle 60° (e.g. ½ - 20 SAE) |
| S.A.E.-S.P. | S.A.E. Standard Threads for Spark Plugs, American spark plug thread, metric ISO thread, flank angle 60° (e.g. M14x1.25 S.A.E.) |
| SB | Manufacturers Stovebolt Standard Thread, Historical American Standard Thread in Vehicle Engine Building (Chevrolet and GMC trucks before 1973) |
| S DeN | Metric special saw thread according to Deckel-Norm DeN 1.596.01. Flank angle 45°/5° (S20x2 DeN) for collets, sleeves, arbors, quills etc. on lid-, tool- and milling machines, see REBELL catalog page 18.8 |
| Sellers | Historical American V-thread with 60° flank angle, introduced by William Sellers in 1864 From the Sellers thread profile the USST thread according to ASA B 1.1-1935 developed and today's UN thread ANSI/ASME B1.1 |
| S.F. | Systems Francais, French pointed thread, flank angle 60° (e.g. No.2: 14x2) |
| Sg | Collet thread (e.g. W 5 x 36, W 6.85 x 40); thread for pull collets to DIN 6341-2 1993 |
| SgF | Italian metric saw-fine thread, UNIM 128, flank angle 30°/3° (e.g. 80 SgF) |
| SGT | Special Gas Taper Threads, American special gas pipe thread, tapered, ANSI CGA V-1, flank angle 60°, taper 1:8 (e.g. 1/8-27 SGT) |
| SI | Système International, French metric thread, flank angle 60° (e.g. SI 4 x 0.75) |
| Sim | Modified French SI thread for the aircraft industry, NF L 05.200 |
| Sk6 | see tightening thread |
| SM | Japanese and Korean thread for sewing machines, JIS B 0226, KS B 0225, flank angle 60° (e.g. SM 1/16 threads 80) |
| SMA | Systems Metrique Amélioré, French metric thread with enlarged core radius, according to French standard N.SE.23 November 1950, flank angle 60°(e.g. SMA 24 x 2.5) |
| Sn4 | see tightening thread |
| Sp | Old Swiss special thread Whitworth thread form according to ESCHER WYSS standard 2040, left and right-hand thread from 25 to 200 mm diameter, for crank pins, regulating rods and the like, in machine and turbine construction, flank angle 55° (e.g. Sp 70 x 8 Gg/1" N 2040) |
| Spez-Rd | special round thread, female thread, flank angle 60° changing to 30°, combined thread profile of metric ISO-thread DIN 13 and metric ISO-trapezoidal thread DIN 103 The special round nut thread can be paired with metric ISO bolt thread according to DIN 13, (e.g. Spez-Rd 12 x 1.75) |
| SQ | Square Thread, Indian flat thread, IS:4694 (e.g. SQ 30x6) |
| ST | Metal screw thread ST, flank angle 60°, DIN-EN ISO 1478, see REBELL catalog page 18.6 |
| STUB-ACME | American trapezoidal thread, flattened, with shortened thread depth, flank angle 29°, ANSI B 1.8-1977 (e.g. ½ -20 Stub-Acme) |
| STI | Helical Coil Wire Screw Thread Inserts, American insert thread to accept HC threaded wire inserts, ANSI B94.9-1971, see REBELL catalog chapter 16 |
| SWG | Dutch bicycle thread, NEN 5516, flank angle 60° (e.g. 15-56 SWG) |
| T | Italian round thread, UNAV 8023, flank angle 30° (e.g. 12 x 1/10 T) |
| TE | Tubes électriques, French pipe thread, NFC 68-311, flank angle 80° (e.g. TE 7-20) |
| TGL | Technical standards, quality regulations and delivery conditions in the GDR. For example: TGL 42727 1986: round thread for general application, flank angle 30° (e.g. Rd16), corresponds as far as possible to the round thread according to DIN 405 |
| Thury | Swiss watch thread, flank angle 47°30' (similar to the British BA thread) |
| TPI | Short for: Threads Per Inch (number of threads per inch) |
| Tr | Metric ISO trapezoidal thread DIN 103, flank angle 30°, see REBELL catalog chapter 14 |
| Tr | Rounded trapezoidal thread for rail vehicles DIN 30295 1973-05, flank angle 30° (e.g. Tr 40 x 5 DIN 30295); this thread is mainly used for spring clamping screws on locomotives. |
| UN | Unified National Thread, American UN thread series with constant pitches (e.g. 20, 28 or 32 threads per inch), flank angle 60°, see REBELL catalog page 7.7 |
| UN-8 | Unified National Thread, American UN thread series with constant pitch 8 turns per inch, see REBELL catalog page 8.4 to 8.5 |
| UN-12 | Unified National Thread, American UN thread series with constant pitch 12 threads per inch, see REBELL catalog page 8.6 |
| UN-16 | Unified National Thread, American UN thread series with constant pitch 16 threads per inch, see REBELL catalog page 8.8 |
| UNC | Unified National Coarse Thread, American standard coarse thread ANSI B1.1, flank angle 60°, see REBELL catalog chapter 5 |
| UNEF | Unified National Extra-Fine Thread, American Standard Extra-Fine Thread, flank angle 60°, see REBELL catalog page 7.4 to 7.6 |
| UNF | Unified National Fine Thread, American standard fine thread, ANSI B 1.1 flank angle 60°, see REBELL catalog chapter 6 |
| UNJC | UNJ coarse thread (UNC profile with enlarged core radius) ISO 3161, flank angle 60°, see REBELL catalog page 7.9 and 7.10 |
| UNJF | UNJ fine thread (UNF profile with enlarged core radius) ISO 3161, flank angle 60°, see REBELL catalog page 7.11 and 7.12 |
| UNM | Unified National Miniature Screw Threads, American standard miniature screw thread, flank angle 60°, ASA B 1.10-1958 (e.g. 0.80 UNM) |
| UNR | Unified National Thread with rounded root, American standard thread with constant pitch and a core radius of 0.108 P to 0.144 P (P=pitch), ANSI B1.1-1982, flank angle 60°, cylindrical (e.g. 2.5/8-4 UNR - 2A) |
| UNRC | Unified National Coarse Thread with rounded root, American standard thread (external thread with core fillet 0.14434 P), ANSI B1.1-1982 (e.g. ¼-20 UNRC - 2A) |
| UNREF | Unified National Extra-Fine Thread with rounded root, American Unified Extra-Fine Thread (external thread with core fillet 0.14434 P), ANSI B1.1-1982 (e.g. 1-20 UNREF - 2A) |
| UNRF | Unified National Fine Thread with rounded root, American standard fine thread (external thread with core fillet 0.14434 P), ANSI B1.1-1982 (e.g. ¼-28 UNRF - 3A) |
| UNRS | Unified National Special Thread with rounded root, American standard thread with special diameter and pitch combinations and uniform tolerance specifications (external thread with core fillet 0.14434 P), ANSI B1.1-1982 (e.g. ¼-24 UNRS - 3A) |
| UNS | Unified National Special Thread, American standard thread with special pitches, flank angle 60°, see REBELL catalog page 7.7 |
| URS | Trapezoidal thread for thread fit with backlash (e.g. 13x2 URS 09001) |
| USST | US standard American National Form, American standard thread (e.g. ¼ - 28 USST) |
| UST | Unified Screw Threads, American-British-Canadian uniform thread from 1948 (obsolete) |
| V | ISO tyre valve thread, ISO 4570/1..3, flank angle 60° (e.g. 8 V 2) |
| V | V-Thread 60-degree with truncated crest and root, American V-point thread with flattened profile, flank angle 60 |
| VDI | Historical thread of the Association of German Engineers from 1888, flank angle 53°8' (e.g. 10 x 1.40 VDI); replaced in 1898 by the S.I. thread |
| Ven | Old DDR valve thread, TGL 39158, flank angle 60° (e.g. Ven 5) |
| Vg | Valve thread for vehicle tyres DIN 7756, flank angle 60° (e.g. Vg 8), see REBELL catalog page 17.4 |
| Vz | Czech tyre valve thread, CSN 014084, flank angle 60° (e.g. Vz 12) |
| W | Withworth thread, named after Sir Joseph Whitworth, was the first standardised thread in the world, introduced in 1841, standardised in Germany according to DIN 11, withdrawn in 1970, flank angle 55° (e.g. W3/8"), replaced by BSW thread |
| W | W 80 x 1/11", thread for valve sleeves, neck rings and protection caps on compressed gas cylinders, DIN 4668, Sept. 1968, thread profile according to Whitworth pipe thread, flank angle 55°, gas cylinders; thread for nozzles, neck rings and protection caps; outside diameter 80 mm, flank diameter 78.521 mm, core diameter 77.042 mm |
| W | Historical Whitworth fine thread 2 from 20 to 189 mm diameter, DIN 240 February 1923, thread profile according to DIN 11, flank angle 55° (e.g. W 60 x 1/6") |
| W DIN 477 | Tapered thread for gas cylinders, cylindrical thread for side nozzles DIN 477, flank angle 55°, see REBELL catalog page 11.7 to 11.8 |
| WHIT | Whitworth Thread Series, British Whitworth standard special thread, flank angle 55°, with special pitches, BS 84 (e.g. WHIT 1/4-32) |
| WHIT.S. | Whitworth Selected Thread Series, British Whitworth thread, selection series, BS 84, AS B47 (e.g. 1.25 in.-12 WHIT.S.) |
| W-4 Gg | Whitworth thread with constant pitch 4 turns per inch, DIN 239, thread profile Whitworth shape, flank angle 55°, outside diameter in mm, pitch in turns per inch (e.g. W 60 x 1/4) |
| W-10 Gg | Whitworth fine thread for locomotive construction, DIN LON 286, 1937, flank angle 55° (e.g. W 22 x 10 Gg), not used since about 1975 |
| W-20 TPI | Shank Cutters Whitworth-Form 20-TPI, Standard SKF-Specification, End mill tightening thread, BS 122, flank angle 55° (e.g. W 16 x 20 TPI) |
| W12x12 | Hoof stud thread for horse studs, shoeing, W 12 x 12 Gg/1", single thread, flank angle 55 |
| Yv | Turkish round thread, TS 61/37, flank angle 30° (e.g. Yv 30) |
| 6AZ | Metric ISO thread according to DIN 13, internal thread according to tolerance class 6AZ for hot-dip galvanizing (e.g. M12-6AZ outside diameter min. 12.335 mm; pitch diameter min. 11.198 mm, max. 11.398 mm; core diameter min 10.441 mm, max 10.776 mm) |
| 25E | Gas cylinders – 25E taper thread for connection of valves to medical and industrial gas cylinders, specification, ISO 10920:1997, International tapered gas cylinder thread 25E, nominal diameter 25.8 mm |
| 60° stub ACME | American ACME thread, flattened, with shortened thread depth, flank angle 60°, ANSI B1.9-1973 (e.g. 0.500-20 60°) |