Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 12S4-12FJS12FJS18 found under Hose Assembly Nonmetallic by Veyance Technologies Inc. The National Stock Number assigned to this part is 4720003476573, and the Federal Supply Class is 4720 Hose And Flexible Tubing. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 12S4-12FJS12FJS18.