Tripod Mounting Post for Universal Binocular Mount 5/8-11 ThreadThe 5 8 11 Tripod Mounting Post lets the Farpoint UBM attach to a surveyor's tripod. The 5 8 11 thread is the standard large surveyor's tripod thread, common on professional and tactical grade tripods favored by some observers for their stability. What it's for If you own a surveyor's tripod with a 5 8 11 thread (sometimes labeled "5 8 surveying" or "instrument thread"), this post adapts your Farpoint UBM to it. Verify your tripod's exact thread spec