Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 87T-140 PSI-3 4 found under Valve Safety Relief by Anderson Greenwood Lp. The National Stock Number assigned to this part is 4820011352924, 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 87T-140 PSI-3 4.