Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number TX1027C4-5A found under Screw Close Toleran by Alcoa Fastening Systems Ltd. The National Stock Number assigned to this part is 5305015098087, 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 TX1027C4-5A.