Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 061-000-091 ITEM 73 found under O Ring by Waukesha Bearings Corporation. The National Stock Number assigned to this part is 5331013452326, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 061-000-091 ITEM 73.