Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 42-55-10029 found under Pin Grooved Headless by Pratt Henry Co. The National Stock Number assigned to this part is 5315009570217, 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 42-55-10029.