Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NB43610 PL7999 ITEM 19 found under Bearing Pad Valve by Sun Coast Supply Corp. The National Stock Number assigned to this part is 4820013773451, 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 NB43610 PL7999 ITEM 19.