Brownells Positive Stop Refill 8-40 Blued—a fast and easy way to fill holes on barrels and firearm receivers that can be ground flush and blued or polished for a finish that makes it tough to tell a hole was ever there. These positive stop screws have a rounded top that blends right in with most barrel contours without grinding. This 12-pack refill is sized for 8-40 threads and features a blued finish designed to match the appearance of blued steel firearms.
Perfect for filling holes on barrels and firearm receivers, these plug screws can be ground flush and blued or polished. Whether you’re removing scope mounts, sight bases, or Picatinny rails from your firearms, these refill screws provide a practical solution for sealing those mounting holes professionally. The 8-40 size is one of the two most popular thread pitches for this application, making them essential for gunsmiths and serious hobbyists alike.
Each pack contains exactly 12 screws, ready to use straight from the box. The blued finish ensures corrosion resistance and an attractive appearance that complements blued firearms. Use these screws with tweezers for precision handling, and pair them with a Checker/Shortener Jig if you need to adjust the screw length for your specific application.
