Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number Y23-M3-4 found under Insert Screw Thread by W M Berg Inc. The National Stock Number assigned to this part is 5325015535107, 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 Y23-M3-4.