Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number RMP4-431 found under Retainer Wiper by Pettibone Llc. The National Stock Number assigned to this part is 5365000312637, 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 RMP4-431.