Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number G48-21 found under Pin Dowel by Roper Industries Inc Roper Pump. The National Stock Number assigned to this part is 5315008243546, 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 G48-21.