Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MD0450 22 found under Life Preserver Vest by Mustang Survival Inc. The National Stock Number assigned to this part is 4220015797439, and the Federal Supply Class is 4220 Marine Lifesaving And Diving Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like MD0450 22.