bolt size questions, PLEASE HELP
Thread Starter
Safety Car
Joined: Apr 2007
Posts: 4,435
Likes: 9
From: Kalamazoo Mi
bolt size questions, PLEASE HELP
Hey all, i have some questions about some bolts.
1)What is the size for the bolts that hold on the front calipers.
2) what is the size for the bolts that hold the power steering pump and bracket on?
thanks all,
Steve
1)What is the size for the bolts that hold on the front calipers.
2) what is the size for the bolts that hold the power steering pump and bracket on?
thanks all,
Steve
Le Mans Master
Joined: Oct 2006
Posts: 7,123
Likes: 433
From: Gladstone MO
C3 of Year Finalist (appearance mods) 2019
I don't remember the front caliper bolts, but the power steering is all 3/8 bolts except for the support that comes off the back of the pump and goes to the front exhaust manifold bolt. That one I think is 3/8 into the head and 5/16 thru the bracket. Or maybe the other way around.
Is that what you need or do you need grip length and thread ?
Is that what you need or do you need grip length and thread ?
Racer
Joined: Mar 2008
Posts: 428
Likes: 0
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
Racer
Joined: Mar 2008
Posts: 428
Likes: 0
Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
I think its like Hillman products.
Racer
Joined: Mar 2008
Posts: 428
Likes: 0
Everyone has Grade 8 in a coarse thread, just not in fine thread. I can even get the coarse thread in stainless steel! It seems like all the independent Auto Supply Stores are gone. They used to have large assortments of Doorman/Motormite hardware. As a matter of fact, there is only one real machine shop left that I would trust with more than a lawnmower engine.
Le Mans Master
Joined: Oct 2006
Posts: 7,123
Likes: 433
From: Gladstone MO
C3 of Year Finalist (appearance mods) 2019
Find a Caterpillar tractor dealer- those guys have grade 8 (and BETTER than grade 8) bolts in all sizes. I got new rear spring hangar bolts from them..
Racer
Joined: Mar 2008
Posts: 428
Likes: 0
Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
If you have an Ace Hardware in your area in the back of the store is usually a wall of cardboard drawers with bolts and fasteners.Hillman is the name of the company. Hillman #2377-C is 7/16"x20x1-1/4" Grade 8...$.90 each
Racer
Joined: Mar 2008
Posts: 428
Likes: 0
Burning Brakes
Joined: Feb 1999
Posts: 1,190
Likes: 1
From: SIMI VALLEY CA
OK to get really technical it's a .437-20 UNF-2B x 1 1/4
I cant help it I'm a mechanical designer.
Have you tried a Chevy dealer?
How many do you need?
I cant help it I'm a mechanical designer.
Have you tried a Chevy dealer?
How many do you need?
Last edited by JIM; Oct 2, 2008 at 11:47 PM.
