5/8″ Axle Inserts spring bearing tang retainer reusable tube pipe shaft ends by | Jul 25, 2026Axle insert held in axle tube by spring ball bearing tang. Axle tube must have hole to accomadate spring ball tang. USED – 5/8″ Axle Tube Inserts. 2-1/16″ axle tube section. Axle tube NOT INCLUDED.