Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ICD BTP 570643 found under Screw Machine by Bren Tronics Inc. The National Stock Number assigned to this part is 5305016678319, 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 ICD BTP 570643.