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Square-head Set Screws Assortment (1/4"-20 thru 1/2"-13 Coarse Thread)Hillman Item #621
An assortment of square-head set screws from Hillman. Square-head set screws are generally used to secure an object within or against another object. Variants included in this assortment run 1/4"-20 thru 1/2"-13 in coarse thread size. Full assortment contains sixteen (16) refills comprised of Hillman item numbers #622 - #637.
Assortment Type