Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 503 215-4 found under Wire Electrical by Huber Suhner Inc. The National Stock Number assigned to this part is 6145012577490, 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 503 215-4.