Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BSG-3328-316-ME-ST-XX-( ) KEY T found under O Ring by Versa Products Co Inc. The National Stock Number assigned to this part is 5331013775368, 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 BSG-3328-316-ME-ST-XX-( ) KEY T.