The Defense Logistics Agency is conducting market research to identify companies capable of manufacturing or obtaining a specific self-locking barrel nut. This is a sources sought notice only and is not a formal solicitation or request for offers. Interested and qualified parties must submit a response by a specified deadline. Companies wishing to become an approved source for this item must submit a Source Approval Request package to demonstrate their capability. The primary point of contact and the SAR Program Office are located in Richmond, Virginia.