Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number GV39-619-21-70 found under O Ring by Gw Technologies Pty Ltd. The National Stock Number assigned to this part is 5331010065470, 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 GV39-619-21-70.