Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SP-305 found under Holder Inserted Hammer Face by Nupla Corporation. The National Stock Number assigned to this part is 5120013957088, and the Federal Supply Class is 5120 Hand Tools Nonedged Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like SP-305.