Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 120-254-1 found under Screw Machine by B And B Specialties Inc. The National Stock Number assigned to this part is 5305015972995, 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 120-254-1.