Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number KHB 25 SAE 41 X 2.5 O-RING BUNA found under O Ring by Hydac Corp. The National Stock Number assigned to this part is 5331014223857, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like KHB 25 SAE 41 X 2.5 O-RING BUNA.