BS Metric high strength large hexagon head bolts 英标BS BS BS Metric high. Weight Calculator Tolerance. BS Specification For High Strength Friction Grip Bolts And Associated Nuts And Washers For Structural Engineering – General Grade. BS High strength friction grip bolts and associated nuts and washers for structural engineering. Metric series. General grade (AMD ) ( AMD.
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In the case of the oxygen processcs the maximum content of nitrogen shall not exceed 0. This Standard makes reference to the following British Standards: Only to be used for the lighter type usage of a larger size bolt than M Although the basic hexagon sizes for the bolts and nuts are in accordance with 1SO Recommendation Rthe next larger width across flats 43951 any given diarneter, as shown in the normal metric series, have been selected in Order to provide greater bearing areas for both bolts and nuts.
The form of thread, and diameters and bd pitches of general 43955-1 metric high strength friction grip bolts shall be in accordance with BS Large hex bolts for structural bolting with large width across flats – short thread. A s nmended Jan. This British Standard has been prepared under the authority of the Mechanical Engineering Industry Standards Committee as b result of the decision taken to adopt the ISO metric screw thread 4395- in the United Kingdom see Appendix Aand requests received from industry for the provision of a specification for high strength friction grip bolts to basic metric dimensions.
This document Newer versions. The impression of the the head or to the centre 0. However, it was pointed out in committee that if ISO strength Grade 8. Heavy Hex Head Configurations.
The Vickers hardness test shall be performed in accordance with the requirements of BS 43995-1 HV – hexagon fit bolt and nut assemblies incorporating corrigendum October Withdrawn. Proof load t a t for nut C. Methodfor Brinell hardness test.
An extract from his statement is given below: Proof load test for nut This website is best viewed with browser version of up to Microsoft Internet Explorer 8 or Firefox 3.
A batch shall consist of the number of pieces 43995-1 in Table 6.
Markings may be either embossed or indented at the Option of the manufacturer, who may also use additional marking forhis own purposes. Hexagon bolts with large widths across flats for steel structures. It is continental practice to maintain a constant tensile strength throughout the diameter rangeof threaded products, thus necessitating a Change in chemical composition because of the increase in ruling section, whereas it is the American practice to maintain a generally constant chemical composition, which in practice leads to a reducthn in the tensile strength over the diameter range.
Standard angles of taper are 3″, 5″ and 8″ and the purchaser shall specify which of these angles are required. BS – Square Standard Number BS For nuts it is only necessary Standard number, e. The extension of the bolt shall be measured, at its true centre line, with a suitable instrument.
BS Metric high strength large hexagon head bolts
Unless otherwise specified, all tests and inspection shall be carried out at the place of manufacture prior to the despatch of the finished material from the works and shall be so conducted as not to interfere unnecessarily with the operation of the works. The dimensions of square taper washers shall be in accordance with Table 11 Figure 6. Worldwide Standards We can source any standard from anywhere in the world. The heads shall be charnfered at an angle of approxirnately 30″ on their upper faces.
Iiardncss Rockwell or Vickers lest on bolt 3. Part 1BS Information on standards BSI provides a wide range of information on national, European and international standards through its Library and its Technical Help to Exporters Service.
BSThread data and standard thread series. Appendix E Recommended gauge for checking squareness of thread to face of nut See 3. Each test selected from Appendix D shall be carried out three times per batch of bolts. The face of the sleeve shall be brought into contact with the leading face of the nut. NOTE 5 Hardness values are given for guidance only. BS 21, Pipe threads. We would be grateful if anyone finding an inaccuracy or ambiguity while using this 4395–1 Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover.
System HR – countersunk head bolt bw nut assemblies. The bearing face shall be m bw c h d i or have a surface equal to thatproduced by machining.