Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4043K050 found under Cap Retention Pressure Plug by Honeywell Aerospace. The National Stock Number assigned to this part is 4730991092568, 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 4043K050.