Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 134-125-3 found under End Cap Knuckle Sha by Tiffin Metal Products Co. The National Stock Number assigned to this part is 1730005462481, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 134-125-3.