Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3MA123-3-4 found under Screw Close Tolerance by Tap Tool Inc. The National Stock Number assigned to this part is 5305001239187, and the Federal Supply Class is 5305 Screws. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 3MA123-3-4.