This is the factory Springfield Armory set screw that secures the castle nut on the M1A. It keeps the castle nut from loosening. Use it to replace a lost or damaged set screw. Compare it with your existing part or the manufacturer's parts diagram to confirm it matches your firearm before ordering.
- Part: Castle nut set screw
- Fits: Springfield Armory M1A
- Brand: Springfield Armory
- UPC: 706397857806
