Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 155 05197 21 found under Pin Tapered Threaded by Mcc Holdings Inc. The National Stock Number assigned to this part is 5315016627643, and the Federal Supply Class is 5315 Nails Machine Keys And Pins. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 155 05197 21.