The product is a set of five 1/2"-20 x 3-1/2" socket head cap screws made of alloy steel with a black oxide finish. These screws are of ASTM A574 grade and feature a 20 TPI thread size. The drive style is Allen and the head style is socket cap head. The screws are from the brand Brighton and are semi-standard model, made in Taiwan. They are designed for industrial applications and come in a pack of five.
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