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3 8 -16 x 2-1 2 Zinc Grade 2 A307 Square Head Bolts (10 pcs.) Hot on Sale
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Diameter: 3 8
Length: 2-1 2
Material: Steel
Finish: Zinc
Head Style: Square (9 16 Wrench)
Thread Size: 16 (Coarse)
Hardness: Grade 2 A307
Type: Square Head Bolt
Box of 10.
A square head bolt has a four-sided head. Compared to standard hex bolts, square bolts have a greater surface in contact with the part being fastened, and therefore provide greater resistance to loosening (though also greater resistance to tightening). Square bolts are typically mated with square-headed nuts.
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