70 gas tank strap bolts

[Lawrence Berte]

Does anyone have a discription of the correct gas tank strap tension bolts for a '70?

[Chuck S.]

Re: 70 gas tank strap bolts

For late 70, fuel tank strap bolts are: 3/8" NC X 1 7/8" long, black phosphate finish, head mark "RBW" with three radial lines, black oxide split lock washer.

I'm pretty sure you won't find them at any auto parts store because stocked lengths are typically 1 3/4" or 2". Also, better torque them to the AIM specs...get carried away and you can buckle the tank.

[Joe L.]

Re: 70 gas tank strap bolts

Chuck and Lawrence-----

The main distinguishing feature of these bolts is that they are of ALL THREAD design. Generally, for standard bolts of this length there will be an unthreaded shank section below the bolt head. These bolts didn't have that design. They were GM #3921688 and they were available until about 10 years ago. I think that you can still get them in reproduction.

[Lawrence Berte]

Re: 70 gas tank strap bolts

Thanks guys. That sums it up. I'll start looking. Lawrence Berte