Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2925-5 found under Valve Check Oxygen System by American Safety Razor Co. The National Stock Number assigned to this part is 4820000578810, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 2925-5.