BS 325-1947 Specification for black cup and countersunk bolts and nuts. This Standard is part of the British Standards Online Service brought to you via
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07FC055BDDA6419995F7E771B200F100 |
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1.24 |
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19 |
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日期： |
2024-6-23 |
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BRITISH STANDARD 325 : 1947,BLACK,CUP AND COUNTERSUNK,BOLTS AND NUTS,BRITISH STANDARDS INSTITUTION,BRITISH STANDARD SPECIFICATION,BLACK,CUP AND COUNTERSUNK,BOLTS AND NUTS,B.S. 325:1947,Incorporating amendments,issued May, 1954 (PD 1895),and October 1961 (PD 4330),BRITISH STANDARDS INSTITUTION,INCORPORATED BY ROYAL CHARTER,BRITISH STANDARDS HOUSE, 2 PARK ST” LONDON, WJ,TELEGRAMS: STANDARDS LONDON W1 TELEPHONE: 01^629 9000,UDC 621.882.072,B3 325 : 1947,This British Standard, having been approved by the,Mechanical Industry Committee and endorsed by the,chairman of the Engineering Divisional Council, was,published under the authority of the General Council on,17th April, 1947.,First published, February) 1928.,First revision, April, 1947.,The Institution desires to call attention to the fact that this,British Standard does not purport to include all the necessary,provisions of a contract.,In order to keep abreast of progress in the industries concerned,British Standards are subject to periodical review.,Suggestions for improvements will be recorded and in due,course brought to the notice of the committees charged with,the revision of the standards to which they refer.,This British Standard requires reference to the following:,B,S. 84. Screw threads of Whitworth form,A complete list of British Standards^ numbering over 6000,fully indexed and with a note of the contents of each, will,be found in the British Standards Yearbook, which may be,purchased from BSI Sales Department* It may also be consulted,in many public libraries and similar institutions.,British Standards are revised^ when necessary9 either by the,issue of amendment slips or revised^ editions. It is important,that users of British Standards should ascertain that they are,in possession of the latest amendments or edition.,NOTE. The requirements for washers in this standard have been,superseded by the publication of B.S. 3410 J Metal washers for general,engineering purposes ゝ to which reference should now be made.,October 1961,ME/61,2,B.S. 325 : 1947,CO-OPERATING ORGANIZATIONS,The Mechanical Industry Committee under whose supervision,this British Standard was prepared consists of representatives,from the following Government departments and scientific and,industrial organizations:,.Admiralty,Crown Agents for the Colonies,Department of Scientific and Industrial Research,.High Commissioner for India,*H.M. Office of Works,Home 〇伍ce,Ministry of Transport,.War Office,Agricultural and Road Machinery Manufacturers Association,Association of Consulting Engineers,British Chemical Plant Manufacturers* Association,British Electrical and Allied Manufacturers' Association,.British Engineers* Association,British Iron and Steel Federation,British Marine Oil Engine Manufacturers, Association,Engineering Insurance Companies,Institute of Marine Engineers,Institute of Petroleum,Institution of Automobile Engineers,Institution of Civil Engineers,Institution of Gas Engineers,Institution of Heating and Ventilating Engineers,Institution of Mechanical Engineers,Institution of Production Engineers,Locomotive Manufacturers, Association,.Machine Tool Trades Association,Railway Companies of Great Britain,The Government departments and scientific and industrial,organizations marked with an asterisk in the above list, together,with the following, were directly represented on the committee,entrusted with the preparation of this British Standard :,National Physical Laboratory,Black Bolt and Nut Association of Great Britain,Boilermakers and Iron and Steel Shipbuilders* Society,British Constructional Steelwork Association,Institution of Engineers and Shipbuilders in Scotland,Institution of Naval Architects,North East Coast Institution of Engineers and Shipbuilders,Railway Carriage and Wagon Builders and Financiers, Parliamentary,Association,Railway Companies of Great Britain,3,BS 325 : 1947,BRITISH STANDARD SPECIFICATION FOR,BLACK CUP AND COUNTERSUNK,BOLTRND NUTS,obsolescent" Amendment No, 3,FOREWORD,B. S. 325 for cup and countersunk bolt heads, nuts and washers was first,issued in 1928, and that first edition was limited to the standardization,of the dimensions of the heads of the bolts, and of the nuts and,washers for use with such bolts.,The present edition, prepared under the authority of the Mechanical,Engineering Industry Committee, has been extended in its scope to,include requirements which define the dimensions of the complete bolts,and indicate the quality of the material.,The revision has, however, been prepared primarily to give effect,to certain desirable changes in the proportions of the bolt heads.,Principal amongst these changes is the ad……
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