Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SG-20 found under Guide Slide by Fahringer T L Co Inc. The National Stock Number assigned to this part is 3432012108921, and the Federal Supply Class is 3432 Electric Resistance Welding Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like SG-20.