Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 260-6A4B1-121 found under Siamese Connection Fire Hose by Guardian Filter Co. The National Stock Number assigned to this part is 4210014284429, 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 260-6A4B1-121.