Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 168 31901 found under Mount Assembly Engi by Hi Shear Corporation. The National Stock Number assigned to this part is 1560002227090, and the Federal Supply Class is 1560 Airframe Structural Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 168 31901.