Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B-2339-LR ITEM NO. 3 found under Valve Water Mixing by T And S Brass And Bronze Works Inc. The National Stock Number assigned to this part is 4510015853051, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like B-2339-LR ITEM NO. 3.