Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4227 found under Boot Dust And Moisture Seal by 3D Instruments Llc. The National Stock Number assigned to this part is 5975014122120, and the Federal Supply Class is 5975 Electrical Hardware And Supplies. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 4227.