[TowerTalk] U Bolts

[AD5VJ Bob]

I am looking to purchase some hardware including, U Bolts for attaching my antenna to the MAST on the Tower and dont know anything
about Metals or building materials.

Texas Towers doesn't seem to have them on their site.

I want a U Bolt that will handle a 2" MAST, but what other specifications do I look for and where do I buy one that is high quality
not some import that is going to fail after a couple of months.

Bob AD5GJ