A selection of frame hardware for frame builders. Manufactured in Taiwan by Allotec, a foundry which makes steel frame parts using the lost wax investment casting method. Please see diagram and details spec in the manufacturer's catalog. I4Seat collar binder nut and bolt, notched type, 16mm from inside surface on nut to inside surface on bolt when fully tightened, M6 threading I5Seat collar binder nut and bolt, notched type, 13mm from inside surface on nut to inside surface on bolt when fully tightened, M6 threading I9Track dropout axle adjustment bolt, 35mm length, M4 threading (Sold as a PAIR) I22Seat collar binder nut and bolt, notched type, 19mm from inside surface on nut to inside surface on bolt when fully tightened, M6 threading