Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 81127S41-20215PC4 found under Retainer Packing by L And E Machine Experimental Lab Inc. The National Stock Number assigned to this part is 5330003993034, and the Federal Supply Class is 5330 Packing And Gasket Materials. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 81127S41-20215PC4.