Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number THHN-8-BLK found under Wire Electrical by Graybar Electric Company Inc. The National Stock Number assigned to this part is 6145014817344, and the Federal Supply Class is 6145 Wire And Cable Electrical. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like THHN-8-BLK.