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International Thread Standards
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International Thread Standards
Specifications of International Thread Standards
► Main page Mobile Version Help Specifications ISO Coarse Thread (metric) DIN 13-1 ISO Fine Thread I (metric) DIN 13-2 ISO Fine Thread II (metric) DIN 13-3 ISO Fine Thread III (metric) DIN 13-4 ISO Fine Thread IV (metric) DIN 13-5 ISO Fine Thread V (metric) DIN 13-6 ISO Fine Thread VI (metric) DIN 13-7 ISO Fine Thread VII (metric) DIN 13-8 ISO Fine Thread VIII (metric) DIN 13-9 ISO Fine Thread IX (metric) DIN 13-10 ISO Fine Thread X (metric) DIN 13-11 Knuckle Thread DIN 405 Knuckle Thread DIN 20400 Buttress Fine Thread DIN 514 Buttress Coarse Thread DIN 513 Buttress Thread 45° DIN 2781 Trapezoidal Fine Thread DIN 103 Trapezoidal Coarse Thread DIN 103 Valve Thread DIN 7756 Cycle Thread DIN 79012 PG Thread DIN 40430 Pipe Thread DIN 158 Dairy Thread DIN 11851 Edison Thread DIN 40400 Glass Thread DIN 40450 Knuckle Thread for glass containers DIN 168 Threads for plastic containers DIN 6063 Camera mount Thread S. & H. Thread Sewing-machine Thread C. E. I. Thread Löwenherz Thread Bodmer Thread French Thread VDI Thread Ducommun Steinle Thread Hamann Patronen Thread Thury Thread Whitworth Instrument Thread Whitworth Fine DIN 239 Whitworth Fine DIN 240 Whitworth Fine DIN LON 282 Whitworth Fine DIN LON special Whitworth Fine DIN LON 286 Whitworth Fine DIN LON 287 S. J. Thread Sellers Thread UNC Thread (USA) UNEF Thread (USA) UNF Thread (USA) UNM Thread (USA) UNR Thread (USA) UNS Thread (USA) 8-UN Thread (USA) 12-UN Thread (USA) 16-UN Thread (USA) 20-UN Thread (USA) NPT Thread (USA) NPTF Thread (USA) NPSC Thread (USA) NPSF Thread (USA) NPSL Thread (USA) NPSM Thread (USA) ACME Thread (USA) STUB ACME Thread (USA) Sharp V Thread (USA) ME Model Engineer Thread (GB) BA British Association (GB) BSB British Standard Brass (GB) BSF Whitworth Fine Thread (GB) BSW Whitworth Coarse Thread (GB) BSPP Whitworth Pipe Thread (GB) BSPT Tapered Whitworth Pipe Thread (GB) Conversion Inch-Fractions to mm Drill bit sizes Download Imprint Sitemap	Thread Standards: The most frequently used thread form is the 60° thread form found in the metric ISO thread and in the UN-series. However, there are other thread standards as well. These are either based on foreign standards or are used for special applications. E.G. in the medical technology, in aeronautical engineering or astronautics. The most common threads are: • ISO Thread (metric) • UN (Unified National) series Thread • Whitworth Thread • Pipe Thread • Trapezoidal Thread • Knuckle Thread • Buttress Thread Advertising: The thread abbreviation includes the thread code letter and the nominal thread diameter or the thread size. Additional values for pitch or TPI, tolerance, multi-lead, taper and left-handedness are added. Often threads that are according to DIN Standard have the major DIN number put in front of the thread abbreviation. Talking of screws the major diameter for screws is determined by the thread tips. The minor diameter by the groove of the thread. The pitch diameter is the distance of two opposite flanks or the distance of the center line of the profile. Advertising:	Advertising:
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