Midwest Fastener 5/16 in.-18 x 1-1/2 in. Flat Socket Cap Screw

The Midwest Fastener 5/16 in.-18 x 1-1/2 in. Flat Socket Cap Screw provides reliable, high-strength fastening for demanding mechanical, automotive, and industrial applications. Engineered from durable steel with a corrosion-resistant black oxide finish, this fastener is designed to sit flush within countersunk holes for a smooth, snag-free surface profile. Featuring an internal hex drive socket, this cap screw allows for high torque installation using a standard hex wrench or bit. Ideal for machinery assembly, tooling, and precision woodworking where a clean, low-profile fit is essential.