The APR AN Bolt Length Gauge accurately shows the proper length of the AN Bolt required when original bolt lengths are unknown and helps to choose the proper length for new holes drilled during installations of modifications. The AN Bolt Lenght Gauge shows 5 lenghts for each of the 8 AN Bolts starting at 1/8" through 7 7/8" in increments of 1/8" (a total of 275 sizes)
To find the length of the AN Bolt rotate the top disc of the computer until the material thickness is shown in the top selector window. To the left of the window find the AN Bolt diameters (AN-3 bolt is 3/16", AN-4 is 4/16" diameter etc.) Select the bolt length in the window opposite the desired bolt diameter to be used.
The selector window shows the proper length when using two thick flat washers. If two thin or one thick flat washer is used, reduce the bolt length one size. If material thickness is in 1/16", 1/32" or 1/64" round to the nearest 1/8".
AN Bolts and proper installation are required by FAA regulations
DISCONTINUED ITEM--LIMITED STOCK AVAILABLE PLEASE CALL FOR QTY
Used 7 on heavily oxidized Airstream. Sanded off oxidation. Presto changeo, an almost mirror-like finish. Will stick with Nuvite. Important to follow instructional video.
This is an amazing aid to my fisning. Something serious inland fishermen should have. My only regret is that I didn't have this over the last 20 years.
I bought the same hat 2 years ago to wear when I travel in Europe. People don't ask silly questions about the US. The hat fits well and looks great! Clearly marks me as Canadian.
