For a detailed analysis of your needs, please email custserv@longlok.com, call 800-566-4565 or click here to fill out the response form.

We are ISO 9001 and AS9100 certified. See our certificate (PDF).

Long-Lok is the engineered fastener company that makes self-locking fasteners and self-sealing fasteners specified by the best engineers world-wide

Long-Lok manufactures military standard AN, MS, NAS, and AS fasteners and specials for the government, aerospace, nuclear and commercial industries.

Self-Seal™ fasteners, manufactured exclusively by Long-Lok, provide the optimum combination of sealing and fastening in one complete unit.

Long-Lok's self-locking fasteners virtually eliminate the possibility of a bolted assembly coming apart during operation.

Long-Lok's Products and Processes