tall head bolts used on halftracks

[steve-0]

the original bolt heads used in the 40s where about 20% taller than the ones made today. if this is important to you i have found a source for the tall head bolts.
they are made by the caterpillar tractor company. you will still need to sand the head markings off, and i think they are kind of pricey.
high strength hex head bolt
http://www.cat.com/parts/hardware



mcmaster also has a tall head bolt but i think the top of the bolt has a depression.
http://www.mcmaster.com/#hex-head-cap-screws/=b1a0n9

[yd328]

Steve,

I believe McMaster-Carr also carries the high hex bolts.

Gary

[steve-0]

thanks
i included them at the end of my post, i think they have a depression on top so by the time you sanded the top flat, you would have a regular bolt.