Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5MB-6H found under Extinguisher Fire by Western Fire Equipment Co. The National Stock Number assigned to this part is 4210001654703, 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 5MB-6H.