The Government requires 61 each of NSN 3H-3110-013190021-NT under TDP version 027, delivery FOB origin. The part requires engineering source approval by the design control activity because approved sources retain essential design, manufacturing/repair knowledge, or data rights not economically available to the Government; alternate sources must qualify under procedures approved by the cognizant Government engineering activity. Specifications, standards, QPLs/QPDs, handbooks, and other standardized documents are available through DODSSP/DAPS in Philadelphia, PA or ASSIST-Online, but patterns, drawings, deviation lists, and purchase descriptions are not stocked at DODSSP. The acquisition will not use FAR Part 12 commercial-item policies, though interested parties may identify commercial-item interest and capability to the contracting officer within 15 days of the notice.