[TowerTalk] Tower Bolts

[Robert Shohet]

Hi Guys,

I have two different types of galvanized
bolts that need identification.  Here are the details:

Bolt #1
2 3/4" long   Thread 1 1/8" long

On the top there is a raised  "BRL"

Bolt #2
1 5/8" long   Thread 1 1/2" long

On the top there is a raised  "507A or S07A"
and a raised "DRA".

"BGP" is stamped in black on the top as well.
This is not raised.

Questions:

1) What "grade" are these bolts?
2) Are these ROHN tower bolts?

Any help would be appreciated.  Thanks!

Bob KQ2M