Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PL1-38-175.0 REF 27B found under O Ring by Link Belt Construction Equipment. The National Stock Number assigned to this part is 5331014479668, 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 PL1-38-175.0 REF 27B.