Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 53N16 found under Collet Standard by Weldcraft Customer Service. The National Stock Number assigned to this part is 3431008721422, and the Federal Supply Class is 3431 Electric Arc Welding Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 53N16.