These nuts have good chemical resistance and may be mildly magnetic. they maintain their strength in high-pressure and high-temperature environments and are used with astm a193 bolts to fasten pressure tanks, valves, and flanges. also known as heavy hex nuts, they are about 10% wider and taller than standard hex nuts and distribute the load over a large area.
Grade 5 hex head cap screws(uss) coarse thread . 1/4-20 grade 5 hex head cap screws; 5/16-18 grade 5 hex head cap screws; 3/8-16 grade 5 hex head cap screws
Astm a193 grade b7 is a standard material specification for chromium-molybdenum alloy steel fasteners for use in high tensile, high temperature and special purpose applications. grade b7 is a heat-treated chromium-molybdenum alloy steel with minimum tensile requirement of 100 ksi, yield of 75 ksi and maximum hardness of 35 hrc.
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…
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