Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PL1-39-76.0 REF 2 B found under O Ring by Link Belt Construction Equipment. The National Stock Number assigned to this part is 5331014479669, 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 PL1-39-76.0 REF 2 B.