The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support Mechanicsburg, is soliciting proposals for the procurement of a stem for a size 1 1/2 inch ball valve, classified under the NAICS code 332919 for Other Metal Valve and Pipe Fitting Manufacturing. The materials required for this contract are critical for shipboard systems, where the use of incorrect or defective materials could lead to severe consequences, including personnel injury or loss of vital shipboard systems. Interested vendors must adhere to stringent quality assurance and certification requirements, including compliance with various military and industry standards, and are encouraged to contact Noelle M. Smith at 717-605-3992 or via email at noelle.m.smith10.civ@us.navy.mil for further details. The solicitation emphasizes a total small business set-aside and includes specific instructions for submitting proposals and certifications, with a focus on past performance evaluations.