Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D20-1-1 ITEM 18 found under Shaft Shouldered by Allard Nazarian Group Inc. The National Stock Number assigned to this part is 3040011799889, and the Federal Supply Class is 3040 Miscellaneous Power Transmission Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like D20-1-1 ITEM 18.