Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 88-00138-0268 found under Solder Tin Alloy by Raytheon Company. The National Stock Number assigned to this part is 3439014886021, and the Federal Supply Class is 3439 Miscellaneous Welding Soldering And Brazing Supplies And Accessories. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 88-00138-0268.