Seat Post Binder Bolts are an essential part for frames with integrated clamps.
The majority of vintage and modern hand-built steel frames use these systems, as well as factory built steel frames from the 70’s, 80’s, 90’s and 2000’s.
These suit frames which require a keyed binder. Do not use these on a frame without a key-way. You may alternatively file the key off for fitment.
SPECIFICATIONS
Hex Size: 5MM
Keyed: Yes
Thread Pitch: M6 x 1.0
Shoulder Width: 8mm (M8)
Bolt Thread Length (Inc Shoulder);
8 X 19mm – 18mm (17mm inc Washer)
8 X 22mm – 20mm (19mm inc Washer)
8 X 25mm – 23mm (22mm inc Washer)
Key Side Length;
8 X 19mm – 12.8mm
8 X 22mm – 14mm
8 X 25mm – 14mm