Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 128 2IN 90T140PSI PL-4123 found under Valve Safety Relief by Leslie Controls Inc. The National Stock Number assigned to this part is 4820012786173, 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 128 2IN 90T140PSI PL-4123.