Transcription of ISO metric screw threads
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ISO metric screw threads
BRITISH STANDARDBS 3643-1:1981(Reprinted, incorporating Amendments No. 1 and No. 2)Specification forISO metric screw threads Part 1: Principles and basic dataUDC copy:PONTYPRIDD COLLEGE, 26/10/2006, Uncontrolled Copy, BSIBS3643-1:1981 This British Standard, having been prepared under the direction of the Mechanical Engineering Standards Committee, was published underthe authority of the Executive Board and comes intoeffect on 31 March 1981 BSI 02-1999 First published June 1963 First revision March 1981 The following BSI references relate to the work on this standard:Committee reference MEE/1 Draftfor comment 78/80250 DCISBN 0 580 11626 3 Cooperating organizationsThe Mechanical Engineering Standards Committee, under whose direction this British Standard was prepared, consists of representatives from the following:The organizations marked with an asterisk in the above list, together with the following, were directly represented on the Technical Committee entrusted with the preparation of this British Standard:Associated Offices Technical CommitteeDepartment of Trade (Marine Division)Association of Consulting EngineersDepartment of TransportAssociation of Hydraulic EquipmentElectricity Supply Industry in England and ManufacturersWalesAssociation of Mining Electrical and Engineering Equipment Users As
BS 4827, ISO miniature screw threads. BS 5346, ISO metric trapezoidal screw threads. 3 Basic profile 3.1 General. This clause specifies the basic profile for ISO general purpose metric screw threads as shown in Figure 1. The dimensions for the various standard pitches are given in Table 1.
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