Bowtie_Aaron

iTrader: (3)

Hey guys,

Im finishing up an LS1 Fbody rear disk swap on my chevelle, and i need to know what the thread size is for the rear caliper bracket to pad abutment.

this is the part that bolts to the backing plate and houses the pads, then the caliper fastens to that.

is it an M10x1.5? i tried a 7/16-14 bolt, and it fits sloppy, so im assuming that its metric, and possibly M10?

it would be the thread size for the two outer most holes...



thanks

aaron

wssix99

iTrader: (5)

Its a metric, high strength, washer head, hex bolt. You can get them from the dealer. Given that these bolts take all of the stress of braking, I wouldn't trust any other hardware.

While you have that off, you can to go RMS Auto Parts and get new rubber boots for the parking brake levers. (They are the only supplier any one has been able to find.)

Bowtie_Aaron

iTrader: (3)

cool,
you dont know the thread size though do you?

thanks man!

aaron

wssix99

iTrader: (5)

On the late model LS1 F-Body, the bolt specs are:

For the REAR -
GM Part Number: 10229606 (Rear caliper bracket bolt)
Description: Metric Heavy Hex Flange Screw
Measurement: M12 X 28 X 1.75
Manufacturer: BBC Fastners
Ultimate Strength: 100 kgf/mm2
Yield Strength: 90 kgf/mm2


If anyone looks at this later and wants the FRONT (They are different)-
GM Part Number: 18023646 (Front caliper bracket bolt)
Description: Metric Hex Cap Screw
Measurement: M12 X 35 X 1.75
Manufacturer: MNP Manufacturing Corp.
Ultimate Strength: 100 kgf/mm2
Yield Strength: 90 kgf/mm2

Bowtie_Aaron

iTrader: (3)

Thanks guys!!!

Aaron

Jeff Smith

iTrader: (44)

Do Fastenal store have it?

wssix99

iTrader: (5)

Not when I looked. You can get them from any GM dealership and they aren't too expensive. (They are on par for what Fastenal would gouge you for on a special bolt.)