Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MSM31-8242 FIGURE 7 found under Ring Retaining by Sabbamerica East Inc. The National Stock Number assigned to this part is 5325012971134, and the Federal Supply Class is 5325 Fastening Devices. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like MSM31-8242 FIGURE 7.