Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5B1-03365 found under Cap Protective Dust by Oldenburg Group Incorporated. The National Stock Number assigned to this part is 5340013656509, 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 5B1-03365.