Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 599B found under Gage Depth Tire Tread by Schrader Bridgeport International. The National Stock Number assigned to this part is 5210003575951, and the Federal Supply Class is 5210 Measuring Tools Craftsmens. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 599B.