Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ROLL-3-250-IN-DIA-X-3-875-IN-W found under by National Gypsum Co. The National Stock Number assigned to this part is 7530012114033, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like ROLL-3-250-IN-DIA-X-3-875-IN-W.