5/16″-18 x 1-1/4″ Zinc Grade 2 / A307 Square Head Bolts (10 pcs.)

Specifications

Diameter: 5/16" Length: 1-1/4" Material: Steel Finish: Zinc Head Style: Square (1/2" Wrench) Thread Size: 18 (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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