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. A square head bolt has a four-sided head.
Screws & Bolts,Square Head Bolts
Square Head Bolt, Steel, Grade 2, Zinc Plated, 5/16-18 Thread Size, 1-3/8 Lg, 10 PK
Specifications of Square Head Bolt, Steel, Grade 2, Zinc Plated, 5/16-18 Thread Size, 1-3/8 Lg, 10 PK | |
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Instock | instock |