Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 300-429 ITEM 23 found under Adapter Straight Tube To Boss by Biomarine Ntron Incorporated. The National Stock Number assigned to this part is 4730010391222, and the Federal Supply Class is 4730 Hose Pipe Tube Lubrication And Railing Fittings. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 300-429 ITEM 23.