Midwest Fastener #4-40 x 3/8 in. Black Oxide Socket Head Cap Screw

The Midwest Fastener #4-40 x 3/8 in. Black Oxide Socket Head Cap Screw is engineered for precision fastening applications where high strength and a compact profile are essential. Constructed from durable steel with a protective black oxide finish, it provides dependable holding power and mild corrosion resistance for machinery, equipment assembly, and maintenance projects. Featuring an internal hex socket drive, this cap screw allows for smooth, secure tightening in tight or recessed spaces using a hex key or Allen wrench. The coarse thread design ensures quick engagement and strong holding capability across various fastening tasks.