Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 8451-181 found under Cap Protective Dust by Lucas France Sa Div Aerospace France. The National Stock Number assigned to this part is 5340143266620, 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 8451-181.