Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PRB5 found under Bracket Fire Extinguisher by Fyr Fyter Co Inc. The National Stock Number assigned to this part is 4210002886849, and the Federal Supply Class is 4210 Firefighting Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like PRB5.