Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SG20 found under Clamp Steering Gear by Holmes Intl Inc. The National Stock Number assigned to this part is 5120003575614, and the Federal Supply Class is 5120 Hand Tools Nonedged Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like SG20.