Hammer Screw 6-40 threads for Small Siler flint and percussion locks. This screw fits small Siler flintlocks made by Chambers before 2012 and is still used on the percussions. This screw is still sent with the small Siler kits both flint and percussion.(can this get any more confusing?) Please measure the threads on your screw with calipers before ordering. A 6-40 screw measures .140 diameter. If your screw measures .162 diameter, please order the Large Siler hammer screw.
