Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 531593 found under Valve Ball by Fwd Seagrave Holdings Lp Div Sea. The National Stock Number assigned to this part is 4820001669955, 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 531593.