Tengco specializes in Hub Cap Bolts and SEMS screws for the automotive industry. These Sem Screws are hex machine screws with pre-attached washers that reduce assembly time. Sems can be supplied with a wide variety of washers which can be used for locking and minimizing vibration in each application. Since the washer is already under the head, SEM Screws allow for fast installation and easy adaptation for many applications. Tengco can make SEMS screws in a variety of sizes and head styles, including hex, hex washer, and pan head. We can also offer a full line of metric SEMS screws. Tengco can supply virtually any special formed metal part required. Tengco has over 35 years of experience providing sophisticated custom cold headed bolts, nuts, screws and washers along with a wide variety of custom automotive hardware.

Don't see your item? Don't see your size? We will custom manufacture Hex Head Machine Screws to your exact specifications.