500 Pieces 3/8in-16 Steel Square Nuts Galvanized, 500PK

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Hex Cap Screws feature a washer face under the head,which creates a better seal when applying load.

.Sealing Washers have a bonded neoprene or EPDM rubber backing and are used in applications that require a stronger seal.

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.Phillips Flat Head machine screws have a flat top with a conical bearing surface andare commonly used in countersunk holes where the screw head must sit flush with the surface of the material.

.These screws have a wide, domed head with a flat undersideand a point that can cut new threads in a pre-drilled hole in thicker metal.

Phillips Pan Head machine screws have a pan-shaped head with a flat top and vertical sidesand are commonly used in electronics..

Square Nuts are four-sided nuts that are designed for use with a square head bolt and flat washerwhichoffer greater surface contact with the part being fastened compared to a standard hex nut, and therefore provide greater resistance to loosening.

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Square Nuts are four-sided nuts that are designed for use with a square head bolt and flat washerwhichoffer greater surface contact with the part being fastened compared to a standard hex nut, and therefore provide greater resistance to loosening..