On a 2000 Heritage, where the stock seat mounts to the sides of the frame. The thread size in the frame that those alum plugs thread into.
Thanks in adv

 

http://partsfinder.onlinemicrofiche....EAT%20ASSEMBLY

If it is part 23A in the schematic, I believe the bolt size is 1/2″-13 x 5/8″.

I have to admit that I am not absolutely positive.

 

Yup.
Spot on. Thanks.

I need to find a couple nice allen head
bolts.
Something that looks decent.

 

Something I like to do is machine the heads on a standard stainless socket head cap screw to give it a nice clean "different from the norm" look. Some times I'll thin the head, dome the head or machine a step in it to give it some flair.