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)
ASME B18.2.1 steel GR5 zinc plated UNC
SCR-HCS-FT-GR5-(ZN)-1_8X4
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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.
 | |
Nominal diameter (d1) | 1 in |
Length (kl1) | 4 in |
Width across flats (s1) | 1 1/2 inch |
External drive | WS1 1/2 |
Material | Steel |
Surface | Zinc plated |
Head type | Hexagon head |
Thread type | UNC |
Property class | GR5 |
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