Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 86-4-2 found under Patch Mending by Thermopatch Corporation. The National Stock Number assigned to this part is 8315003000154, and the Federal Supply Class is 8315 Notions And Apparel Findings. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 86-4-2.