Hexagonal bolt with thread up to the head
ASME B18.2.1 steel GR8 zinc plated trivalent UNC
SCR-HCS-FT-GR8-(ZT)-1/4_20X1 1/2
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The thread length differs from standard ASME B18.2.1 thread to head
1 INCH (in) = 25.4 mm
FT = full thread
Mechanical properties are regulated in SAE J429.
Standard thread tolerance according to ASME B1.1 = 2A (for male thread)
 | |
Nominal diameter (d1) | 1 in |
Length (kl1) | 3-3/4 in |
Width across flats (s1) | 7/16 inch |
External drive | WS7/16 |
Material | Steel |
Surface | Zinc plated |
Head type | Hexagon head |
Thread type | UNC |
Property class | GR8 |
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