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03/06/2010 3-74 - Thread StandardsThe most frequently used thread standard is the metric ISO Thread. However, there are other thread standards as well. These are either based on foreign standards or are used for special applications. in the medical technology, in aeronautical engineering or most common threads are:t *40 5ISFBE NFUSJD t 1JQF 5ISFBE t ,OVDLMF 5ISFBEt 8IJUXPSUI 5ISFBE t 5SBQF[PJEBM 5ISFBE t #VUUSFTT 5ISFBEThe 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 of screws the major diameter for screws is determined by the thread minor diameter by the groove of the pitch diameter is the distance of two opposite %anks or the distance of the center line of the pro& Speci!]

03/06/2010 www.dmeeu.com - 3- 75 Whitworth Pipe Thread DIN ISO 228 BSP (British Standard Pipe) British Standard Pipe Thread, with sealant compound (parallel, cylindrical), external = G

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