DLR
Member
- Joined
- Nov 24, 2018
- Messages
- 71
- Points
- 18
- Location
- Central PA
- Roxor Ownership
- Roxor Owner
- Roxor #
- 001176
Just checked out my door hinges today myself. The existing holes are threaded for 8mm x 1.25 metric thread. Theres only a .0004 difference in size between an 8 mm x1.25 bolt and a 5/16”x 24thread bolt, so you should be close chasing the existing threads with a 5/16x24 tap and using the 5/16 bolts/ screws. I’m just going to pick up some 8mm screws as I don’t have that size tap!
The tap is more likely a 5/16-18 tap. Converting M8-1.25 from metric to English units gives about 20 threads to the inch, and for the short distance you are tapping, 18 would reform/recut the threads better than 24 tpi. The good news is that you don't need to buy special washers for M8 screws, just use 5/16, as the tolerances are much larger than the difference between 5/16 and M8, as noted above.