Hardware
AustriAlpin 12mm glue-in
These bolts are made from beefy 8mm grade 304 stock and milled down to 6mm on the legs and placed in a 9/16″ hole. AustriAlpin docs call for a 14mm hole and 9/16″ is approx. 14.25mm. Glue-in bolts are the only bolt type where you can substitute an approximate metric or imperial hole for the given bolt.
![Austrialpin 12mm Bühler bolt; this is the bolt primarly used in Bolton replacement efforts.](https://i0.wp.com/www.gregkuchyt.net/wp-content/uploads/2014/12/austrialpin_buhler-300x125.jpg?resize=300%2C125)
Bolt Products twisted-leg glue-in
Simple, strong, smart. Designed to be installed incorrectly and still meet EN standards the 12mm twisted-leg bolts test out to 40kN and the larger 16mm at just shy of 80kN. We have two different batches of these bolts. A first batch of 50 12mm bolts were donated by the American Safe Climbing Association and are 304 stainless steel. A second batch of 125 12mm bolts was purchased with AAC/AF/local donation funds and are made of 316L stainless steel for enhanced corrosion resistance. These bolts have been specially re-designed by the manufacturer to offer a wider interference fit to accommodate the .7mm larger 1/2″ hole vs the 12mm hole the bolt was originally designed for.
![Bolt Products twisted leg bolt](https://i0.wp.com/www.vtboltreplace.org/wp-content/uploads/2018/04/bp_twist.png?resize=315%2C130&ssl=1)
Fixe Hardware 12mm Triplex
This bolt is used in temporary installations as it is easily removable and reusable.
![Fixe 12mm x 75mm Triplex bolt](https://i0.wp.com/www.vtboltreplace.org/wp-content/uploads/2018/04/fixe_triplex.jpg?resize=300%2C161&ssl=1)
Glue
Powers AC100 Gold, ITW Redhead A7, and Hilti RE-500 glues have all been used to date. Consult the hardware replacement log(s) to see which glue has been used on a particular route.