Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S0S-6143-12 found under Spacer Sleeve by Penn Engineering And Manufacturing. The National Stock Number assigned to this part is 5365013787415, and the Federal Supply Class is 5365 Bushings Rings Shims And Spacers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like S0S-6143-12.