Norb_O
November 21, 2013, 10:43am
1
I want to make a license plate mount rather than pay for the overpriced stuff out there. All I need is a tow hook that I can hack up. I know they’re on eBay but figured I’d ask locally before going there.
If it matters it’s going on an '01 E39, but I’m fairly sure that most/all BMWs are the same.
PM me, or text 716 949 7424
llink78
November 21, 2013, 11:12am
2
Norb you can have mine. Stupid corse threads i looked forever for a matching bolt
Norb_O
November 21, 2013, 11:16am
3
Likewise. It’s not a standard thread. Someone once measured it:
I just checked and it’s definitely not Acme thread, which uses a trapezoidal form with a flat apex and valley. The tow hook has quite rounded threads. I read someplace that it’s a deliberately non-standard size to prevent people from using inappropriate bolts.
According to Ron Stygar it’s M16x3.
That’s quite close to 5/8"-8, which translates to M15.875 x 3.175mm. Probably close enough that you wouldn’t know the difference for very short thread engagements—once you’re up to 9 threads you’re half a thread pitch off though.
However M16x3 isn’t a normal size (std = M16 x 2), but then again neither is 5/8-8 (std = 5/8-11). Even McMaster-Carr doesn’t carry either of those sizes of tap, so the point may be moot.
Neil
Shot you a text
Norb_O
November 22, 2013, 10:59am
4
Tom came through for me, thanks man.
llink78
November 22, 2013, 7:31pm
5
No prob. Thx for stoping by.
