Square head bolts have a large, square shaped head that allows for easy gripping when used with a socket or wrench.
Standard: ASME B18.2.1
Material: Steel
Finish: Plain, Zinc Plating, Hot Dip Galvanized
Grade:Grade 2, Grade 5,Grade 8
Specification: SAE J429, ASTM A307
Thread: UNC & UNF, Class 2A
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