The Navy plans to award a sole-source contract for four units of a specific valve (NSN 7H-4820-011667106), as it lacks the technical data to produce the item. Only sources already approved by the In-Service Engineering Activity (ISEA) will be considered; interested firms may pursue approval by submitting a Source Approval Request (SAR) for NAVSEA review, a potentially lengthy process. Offers for remanufactured, surplus, or repaired items will not be accepted. Delivery is FOB origin. No specific performance location or budget amounts are stated.