Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 259-5106768 18IN STBD found under Valve Butterfly by Bollinger Shipyards Lockport Llc. The National Stock Number assigned to this part is 4810015621262, and the Federal Supply Class is 4810 Valves Powered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 259-5106768 18IN STBD.