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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On 24th May, the Right Hon. A batch shall consist of the number of pieces shown in Table 1. High strength large hexagon bolts for steel structure. Please download Chrome or Firefox or view our browser tips. A gauge recommended for carrying out this test together with the manner in which the test is to be undertaken is shown in Appendix E. System HR-Hexagon bolt with large width across flats and nut assemblies.
This projection shall be rounded to bss sharp edges. A suitable design of gauge for this test would be a plain ring gauge having a maximum thickness equal to the nominal diameter of the bolt, a minimum fillet radius in the bore equal to the maximum radius under the bolt head and an internal diameter as specified above.
Nuts shall be chamfered at an angIe of approximately 30″ on their upper faces and they shall have a washer face on the bearing surface.
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High-strength structural bolting saaemblies for preloading-Part 3: Only to beused for the lighter type of construction where practrcal condltlons such usage of a larger size bolt than M The Rockwell hardness test shall be performed in accordance with the requirements of BS Although it is appreciated that some of those sections of industry already using ISO inch Unified screw threads may find it necessary, for various reasons, to continue with their use for some time, Whitworth and BA threads should be superseded by ISO metric threads in preference to an intermediate change to ISO inch threads.
The Vickers hardness test shall be performed in accordance with the requirements of BS The hardness shall be as follows: Standard Specification for structural bolts,steel,heat treated MPa minmum tensile strength metric.
If failure occurs due to the Stripping of the thread, the individual test shall be discarded and sb specirnen substituted. If, in addition, the purchaser desires to make his own inspection, he shall state so in his enquiry and contract or order. Only to be 43395-1 for the lighter 43995-1 usage of a larger size bolt than M If the threads of the mandrel are damaged during the test, the test shall be discarded.
Should any specimen fail to meet the requirements of a specified test, an additional sample of double the number of specimens from the Same batch at the time of manufacture shall be tested and if all the additional specimens satisfy the requirements of the test the batch shall be deemed to comply with this Standard.
BS Metric high strength large hexagon head bolts
An extract from his Statement is given below: Each test selected from Appendix D shall be carried out three times per batch of bolts. On the question of the material to be utilized for general grade bolts to Part 1 of this Standard, the BSI committee responsible were unable to reconcile the different practices adoptedon thecontinent,as detailed in ISO Draft Recommendation No. This agreement will enable ba industries of the world to align the usage of screw threads and to minimize the present diversities of practice.
Size px x 435-1 x x Document Status Indicators The Green document status indicator indicates that the document is: Customers who bought this product also bought BS System HV – Hexagon bolt and nut assemblies Withdrawn.
Dimensions are given for a range of nominal bbs from 12 mm M 12 to 36 m M 36 inclusive and mechanical properties are specified. The shank diameter shall be capable of acceptance by a ring gauge having an internal diameter equal 4395–1 the maximum shank diameter as specified in Column 2, Table 5 and subject to a tolerance of plus 0.
ES’ Method for Vickers hardness test ‘, Part 1.
The thread shall be tolerance class 4 h except that the major diameter shall be equal to the minimum major diameter for class 4 h with a plus tolerance of one quarter of the 6 g major diameter tolerance.
The Standard nominal lengths are given in Appendix F, together with preferred size combinations of diameter and length. Any alternative method of use should be left to the responsibility of the engineer and should be noted on the appropriate drawings or documents, or both.
Proof load t a t for nut C.
BS 4395-1-1969 Metric high strength large hexagon head bolts
The bearing surface of the nut shall be square to the axis of the thread of the nut within the tolerances given in Column 11, Table 8. Metric series Part 1. They shall be hardened by quenching in oil and shall then be tempered.
Should any specimen fail to meet the requirements of a specified test, an additional sample of double 4935-1 number of specimens from the same batch at the time of manufacture shall be tested and if all the additional specimens satisfy the requirements 43395-1 the test the batch shall be deemed to comply bbs this standard. The nominal length of the bolt shall be the distance from the underside of the head to the extreme end of the shank, including any chamfer or radius.
British industries on a broadening front should adopt metric units sector by sector, until that system can become in time the primary system of weights and measures for the country as a whole A batch shall consist of the nurnber of pieces shown in Table 6.