bolt sizing

[IBDMANN]

I'd like to use some arp bolts for my 69 camaro. Does anyone know the size for the bolts that go through the front leaf spring eye in the pocket. Also i've got a speedtech sub and would like to know what sizes that mount the lower control arms to the frame
thanks

[Apogee]

Just my $.02, so take it for what it's worth. It's not that ARP can't make just about any fastener you might need or want, but they really specialize in applications where there is something to be gained with a premium grade fastener in order to justify the premium grade pricing. The applications you've mentioned rarely ever fail due to a lack of fastener strength or quality or anything for that matter, other than maybe corrosion. Even then a good zinc plated Grade 8 fastener will outlast most other components on the car.

Tobin

[IBDMANN]

when it reads rh thread does that mean it tightens clockwise

[exwestracer]

F911 bolts are MORE than strong enough for any automotive application. I use their 1/2" NF bolts in single shear on the radius rods on my supermodifieds, and I've never had a failure, or heard of anyone else having one fail... Check them out here:
http://www.f911.com/fore2b.html

[Apogee]

when it reads rh thread does that mean it tightens clockwise

RH threads = clockwise to tighten...counter-clockwise to loosen

If you're interested in learning more about fasteners, I would highly suggest reading Carrol Smith's Fastener Handbook as it covers almost everything you might want to know with respect to fastener use as related to automobile applications.

Tobin
KORE3

[Bryce]

my hardware store sells camcar fasteners. They come in allen head cap screws and have the same strength as a f911.

[JRouche]

CAT bolts. Yes, the tractor peeps. They have a pretty good selection of bolts and they are proven in the industry.

F911, PFC, FNL (the "grade nine" bolts from fastenel) are all decent bolts. USA rolled bolts that may be a bit nicer than the grade 8 hardware store bolts. But even the hardware store bolts are fine IMO as long as they are of sufficient size. I like a 5/8" bolt for suspension loads. Like control arm bolts or coilover bolts. Where the bolt is in shear and taking the weight of the car. Shock bolts are fine at a 1/2". It takes alot to mangle a grade 8 bolt. Offshore bolt or US made. I have run many through the ringer. And even when overloaded they tend to deform before snapping.

Now back to yer question, ARP? You may have a difficult time finding the correct bolt. They dont really make all purpose fasteners. They make fasteners for specific purposes. Meaning lenth and more imortantly for a shear bolts is the grip length. You may find a 1/2" bolt in the inventory that is the correct length for your needs but the grip length is wrong. Where you will have to put the threads in shear. Not a good idea, and they will tell you that. They manufacture fasteners to be used correctly, which is in tension. Thats their main concern. So a tension bolt that was engineered to be used in tension wont be recommended to be used in shear by them. Ask them, they will give you the straight skinny. Most of their line is concerned with tension fastening. Like head bolts, rod cap bolts, main cap bolts and so on, they are all clamping bolts, not shear load bearing bolts. They do have some engine bolt kits, where you have some small appliances bolted up in shear. But thats not super critical applications and not where they got their name for providing quality fasteners. Their bread and butter is in the clamping bolt application, not shear load applications. Give them a call. Yes, they can make a bolt for you. Hang on to yer wallet cause its gonna fly away. They have a rep to uphold and will NOT recommend a shear bolt that they make unless its purpose made. Like CAT LOL

YUP.. Cat makes shear bolts and uses them ALL day long. Look at a tractor, many of the fasteners are in shear, and take a great amount of abuse. And they only cost 4-8 bucks each. If yer lucky you can drive over and pick them up. And Ill drive over to ARP if you want and pick up the 90 dollar bolts from them if you want, they are within eye shot from me. JR

A lil blurb about some bolts....

https://www.pro-touring.com/forum/sh...t=55420&page=2

[IBDMANN]

thanks for the info