BS-SP-18 19-1949.pdf
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1、BRITISH STANDARD BS SP 18 & 19:1949 Incorporating Amendment Nos. 1 and 2 Specification for Washers for aircraft purposes (primarily for use with timber) Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:19:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS SP 18
2、& 19:1949 This British Standard, having been approved by the Aircraft Industry Standards Committee and endorsed by the Chairman of the Engineering Divisional Council, was published under the authority of the General Council of the Institution on 10 February 1949 BSI 05-2000 ISBN 0 580 34440 1 A Brit
3、ish Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a fron
4、t cover, an inside front cover, pages i and ii, page 1 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No.Date of issueCom
5、ments 2575September 1956 4141April 1984Indicated by a sideline in the margin Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:19:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS SP 18 & 19:1949 BSI 05-2000i Contents Page 1Scope1 2Material1 3Dimensions1 4Finish
6、1 5Identification1 Table 1 Material1 Table 2 Dimensions1 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:19:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:19:32 G
7、MT+00:00 2006, Uncontrolled Copy, (c) BSI BS SP 18 & 19:1949 BSI 05-20001 1 Scope These British Standards apply to the materials, dimensions and finish of washers generally used with timber in aircraft. The washers are primarily for use with B.A. and B.S.F. bolts. 2 Material The washers shall be man
8、ufactured from the appropriate material specified in Table 1. 3 Dimensions The washers shall conform to the dimensions specified in Table 2. 4 Finish The washers shall be flat within a tolerance of 0.005 in. with parallel faces, and free from burrs. All washers manufactured from cold rolled mild ste
9、el, complying with BS S 5101), shall be cadmium plated in accordance with Ministry of Supply Process Specification D.T.D. 904.1) 5 Identification The washers shall be identified for ordering purposes by the number of the British Standard together with the appropriate code letter shown in Table 2, e.
10、g. cold rolled, mild steel washer for 7/16in. bolt is SP. 18 L. Table 1 Material Table 2 Dimensions 1) Latest issue. BSMaterial BS SP 18Cold rolled mild steel, complying with BS S 510a, cadmium plated. BS SP 19Stainless steel, complying with BS S 526a or BS S 527a. a Latest issue. To suit boltsCode
11、letter Diameter ADiameter B Thicknessa C max.min.max.min. 6 B.A.A in. 0.123 in. 0.118 in. 1.01 in. 0.99 in. 0.064 (16 S.W.G.) mm 1.6 4 B.A.B0.1570.1521.010.990.064 (16 S.W.G.)1.6 2 B.A.C0.2020.1971.261.240.064 (16 S.W.G.)1.6 1/4 in. B.S.F. E0.2700.2651.261.240.064 (16 S.W.G.)1.6 5/16 in. B.S.F. G0.3
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