Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number M85049 138-50A found under Cap Protective Dust And Moisture by Society Of Automotive Engineers Inc. The National Stock Number assigned to this part is 5340008898677, and the Federal Supply Class is 5340 Hardware Commercial. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like M85049 138-50A.