The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is soliciting quotes for the procurement of Ball Bearings, Annular (NSN 3110 009873729). This procurement requires engineering source approval to ensure the quality of the part, necessitating that the item be manufactured by approved sources with unique capabilities and manufacturing knowledge. These bearings are critical components used in various military applications, particularly in submarines and surface ships, and must adhere to stringent military specifications, including MIL-B-17931 for quiet operation. Interested vendors must submit their quotes by April 23, 2025, to the primary contact, Vincent Molesky, via email at vincent.m.molesky@navy.mil, and must comply with all quality assurance and inspection requirements outlined in the solicitation.