These give the ability to tighten the back spring, giving tension to the armature bar and allowing it to move the needle to move up and down.
- Brass
- .5-inch wide by .6 inch long by .125 inch thick
- .179 inch diameter hole for #8 screw
These give the ability to tighten the back spring, giving tension to the armature bar and allowing it to move the needle to move up and down.