Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SS 070 A1 found under Gage Block by Ls Starrett Company The. The National Stock Number assigned to this part is 5210016899821, 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 SS 070 A1.