A head with no markings is grade 2, one with 3 lines spaced 120 degrees is grade 5, and 6 lines spaced at 60 degree intervals is grade 8. nuts are marked in several different ways—see identification marks for hex and heavy hex nuts below.
5/16 in.-18 x 1-1/2 in. hex button head stainless steel socket cap screw (2-pack) socket cap screws are fully threaded fasteners socket cap screws are fully threaded fasteners with a uniform diameter the entire length of the shaft. they are primarily used to fasten metal parts together.
Astm a193 grade b7 specification covers requirements for high tensile alloy steel bolting material for use in high temperature or high-pressure service and other special purpose applications. it is a standard specification defining typical chemical composition, mechanical properties, hardness requirement, preferential heat treatment, product marking, certification and other requirements, …
Taper washer. taper washer are square or half round, taper washers are designed to be used on channel sections, underneath nuts with tapered flanges to enable the bolt assembly to fit square when tightened. 12 item(s) sort by. show. per page. metric square taper washer for u sections 8% hardened steel din6918 ...
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