- Exterior: Black
- Manufacturer Grade: Grade 8
- Color: Black
- Brand: Spectre
- Thread Style: Right Hand
- For General Motors TH350, Powerglide and most TH400
- Bolts are 3/8 inch – 24 x 5/8 inch
- Lock nuts included
- Bolts are grade 8, black oxide plated for corrosion resistance









John B. –
Fit like it’s supposed to
Monique cortez –
They did not come with a washer to keep the bolt from digging in to the fly wheel surface.
Elias Bass –
WILL USE THESE TOMORROW JUST PUT THE ENGINE AND TRANS BACK IN THE CAR TODAY
LOU ANN HELMUTH –
good
Lelen –
So you just put a months worth of work in your small block Chevy. New Dart heads, long tube heads, Isky cam with high lift and duration and a 2500 rpm stall converter. This motor is the panty dropper you dreamed of since forever. ARP bolts are back ordered and these bolts have a good rating and their GRADE 8! You get them and they are made in China, but so is your mail order wife and she is a catch. Wait, where are the grade markings, because they are not on the bolt, but you trust Amazon because Jeff Bezos looks like your favorite appendage and that has never let you down right? You neighbor John has a Dodge Challenger with a 6.2 Hemi that he thinks is the bees knees. So you guys decide to line up at the stop light, it turns green and you drop the hammer on your 383 stroker and you hear a loud bang and your engine redlines at 9,000 and you lose motive power and john leaves you in the dust. And you think I should have gone to Ace where they sell certified grade 8 fasteners for about $1.25 a piece. Thanks to China your engine spun a bearing and your wife is looking at John with hunger in her eyes.
Alfonso –
Ok
Tony Wall –
They are bolts and they work.
Wprince454 –
Cheap insurance for a new build