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View Full Version : eyebolts for seatbolts in stock mount points?


tom91ita
05-16-2007, 06:17 PM
i am debating getting eyebolts and snap-in's for the lap portion of belts.

did some googling for 12mm and fine thread 1.25 pitch and not having much luck.

should i make some by turning down a larger SAE and adding the threads or should i just punt on using the stock mount points?

the stock mount points look stronger than a typical eyebolt with a larger "fender" washer.

tia, tom
Speed Raycer
05-16-2007, 07:04 PM
Try a 7/16 20 and see what happens...

The stock mounting location may "look stronger" but be sure that they're in the proper spot in relation to your seat. Typically they become too far back and too high once a race seat goes in.

Punt the washers in the kits and break out the 12ga or 1/8" plate and make some real "washers"
tom_sprecher
05-18-2007, 09:32 AM
Good luck finding the M12 x 1.25 as just trying to find socket heads fasteners in fine thread can be a bit challenging over here.

Try Fastenal and you might luck out.

I'm usinig my stock mounts and yes they are a bit back there but at 6'2" in an RX-7 so am I. :D
dick elliott
05-18-2007, 10:04 AM
Drill the hole out to 1/2", stick the eye bolt thru and put a LARGE washer and nut on the other side. "So simple a cave man could do it"
Knestis
05-18-2007, 01:10 PM
Many "metric" cars use the 7/16 NF thread on seatbelt bolts. I'd check and make sure that doesn't work before getting too carried away.

K
x-ring
05-18-2007, 06:16 PM
Many "metric" cars use the 7/16 NF thread on seatbelt bolts. I'd check and make sure that doesn't work before getting too carried away.

K
[/b]

My Datsun did.
tom_sprecher
05-21-2007, 12:48 PM
My 1st gen RX-7 does.
Z3_GoCar
05-23-2007, 12:52 AM
My '97 BMW does... but then again maybe it might not be a good example as it was built in the part of the Fatherland know as South Carolina :D

James
badal
05-23-2007, 11:35 AM
All cars for the US market use the 7/16th fine by Federal law
dickita15
05-23-2007, 01:28 PM
All cars for the US market use the 7/16th fine by Federal law
[/b]
well i just learned something new. any idea when that took effect?
badal
05-23-2007, 03:40 PM
well i just learned something new. any idea when that took effect?
[/b]

No, but based on the cars I have seen, I would not be suprised if it was when seatbelt mounts were first required 1963?
Greg Gauper
05-23-2007, 04:48 PM
All cars for the US market use the 7/16th fine by Federal law
[/b]
You sure about that? Are you saying all cars built for the US market, or all cars built in the US?

I&#39;ll double check tonight when I get home, but I swear my factory Honda OEM bolts for my seat belts were metric <_< (1984 Civic)
Greg Amy
05-23-2007, 05:25 PM
FMVSS (Federal Motor Vehicle Safety Standards) 209, regulating seat belt assemblies, requires "...seat belt assembly anchorages that do not require anchorage nuts, plates, or washers...shall have 7⁄16–20 UNF–2A or 1⁄2–13UNC–2A attachment bolts or equivalent metric hardware." I would imagine most manufacturers choose to go with the SAE standard rather than buck the trend and have to prove compatibility with metric.

Yes, I have a copy. Yes, it&#39;s probably on the InterWeb...
tom91ita
05-23-2007, 07:03 PM
....equivalent metric hardware....[/b]

i am convinced mine are M12 by 1.25 fine thread. my guess is that the metric equivalent may just refer to the grade of the bolts. and if 7/16 or 1/2" diameter are okay, the 12mm is right between those.

i will look at the geometry of the stock location vs. the recommended angle of the belt supplier to see if it should be changed.