Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B53-6300T-3-X-316L-20-5-31 found under Butterfly Valve by Tri Clover Inc. The National Stock Number assigned to this part is 4820014464092, 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 B53-6300T-3-X-316L-20-5-31.