Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 99548 found under Washer Flat by Stewart And Stevenson Power Inc. The National Stock Number assigned to this part is 5310014335842, and the Federal Supply Class is 5310 Nuts And Washers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 99548.