NAVSUP WSS Mechanicsburg is seeking a stem for a 4-inch ball valve built to NAVSEA Drawing 6404978, Find No. 27, from QQ-N-286 Form 2 annealed and age-hardened material with no weld repair allowed. The part is Level I/SUBSAFE Special Emphasis material for a crucial shipboard system, requiring stringent quality-system, inspection, traceability, material-certification, configuration-control, and Government source quality-assurance compliance. The requirement is a total small business set-aside procured under Emergency Acquisition Flexibilities, with bilateral award and past performance considered in evaluation. Supplies are FOB destination and carry a one-year warranty from date of delivery. Contractors must also comply with marking, mercury-free, DPAS rating, and documentation/CDRL requirements.