SMMT Guide on Couplings > Parallel Jaws
| 50mm Ball Brackets and Couplings Correct jaw/eye and hook/eye set up Parallel Jaws |
Pin / Hook and Eye Couplings and Combination Units Insufficient and Excessive clearance 40 mm Din eyes |
Parallel Jaws
This type of jaw does not conform to British Standards and should be avoided as insuficient vertical articulation between eye and jaw puts excessive strain on jaw, towing bracket, overun coupling and trailer drawbar.
Parallel Jaws are Dangerous Avoid at all Costs
