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.
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Taper washers are used in conjunction with bolting products on steelwork to provide a flat plane under fastener heads for sloping webs, sections etc. butler fasteners limited in nottingham supply both 'd' type malleable iron taper washers and mild steel square taper washers. d type taper washers5° taper size size size m103/8" m165/8" m241" m121/2" m203/4" m30…
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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