Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 85520100020 found under Gearshaft Spur by Kollsman Inc. The National Stock Number assigned to this part is 3040000781096, 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 85520100020.