This is a sole-source procurement for NSN 7R-1650-016656130-H5, quantity 7 each, with delivery FOB origin. The item is flight critical and requires Government source approval; only previously approved sources are solicited, and new sources must submit the data required by the NAVSUP WSS Source Approval Brochure. Because approval of a new source normally cannot be completed in time, award cannot be delayed for that approval. The Government intends to negotiate with only one source under FAR 6.302-1, but all responsible sources may indicate their interest and submit capability statements or proposals. This notice is not a request for competitive proposals, though responses will be considered when determining whether to conduct a competitive procurement.