Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D5E10439-161 found under Gage Firing Pin by Bae Systems Operations Ltd. The National Stock Number assigned to this part is 5220004800769, and the Federal Supply Class is 5220 Inspection Gages And Precision Layout Tools. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like D5E10439-161.