Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number KNL420J found under Insert Screw Thread by Matheson Gas Products Inc. The National Stock Number assigned to this part is 5325004205958, and the Federal Supply Class is 5325 Fastening Devices. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like KNL420J.