The standard astm a193 b7 fasteners are typically available in a plain, bare metal finish. but if required by the buyer, the astm a193 grade b7 stud bolts can be zinc plated, hot-dip galvanized, xylan coated, ptfe coated. coating the astm a193 b7 fasteners aids in enhancing the corrosion resistance of the fasteners.this astm a193 grade b7m bolts are commonly used in fastening medium high ...
Step bolts, similar to a carriage bolt in bearing surface and square-neck design, but with a wider, lower-profile, round head. applications/ advantages step bolts are preferred for use where wood is bolted down as decking--the larger diameter head of the step bolt will not pull through the soft wood. smooth, low, rounded head permits unrestricted movement over the surface.
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