Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number C53978-11 found under Stud Brush Holder by Continental Electric Motors Inc. The National Stock Number assigned to this part is 5307007649000, and the Federal Supply Class is 5307 Studs. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like C53978-11.