This is a restricted solicitation for commercial items, anticipating a firm-fixed-price purchase order on a sole source basis to Leach International Corporation for a specific relay. The requirement is for 33 each of the relay (NSN 5945-01-HS3-7350, P/N KX-X5N), with an option for up to 30 additional units at the same price within one year of award. All items must have clear traceability to the OEM, Leach International (CAGE 58657), and a Certificate of Conformance is required per FAR 52.246-15. Only quotations with F.O.B. Destination or F.O.B. Origin shipping terms will be accepted; other terms such as EXW or Incoterms 2020 are not accepted. The applicable NAICS code is 336413 with a small business size standard of 1,250 employees, and responsible sources may submit quotations.