Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S123B00100 found under Screw Cap Socket Head by Cts Corp. The National Stock Number assigned to this part is 5305015554634, 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 S123B00100.