Hexagonal bolt with thread up to the head ASME B18.2.1, blue passivated zinc plated GR5 steel (A2K), UNC (comparable with ISO metric thread)
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Hexagonal bolt with thread up to the head ASME B18.2.1, blue passivated zinc plated GR5 steel (A2K), UNC (comparable with ISO metric thread)
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The thread length deviates from the standard ASME B18.2.1 thread to head
1 INCH (in) = 25.4 mm
FT = full thread
The mechanical properties are regulated in SAE J429.
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