The Forster 8-40 Bushing Set (brand part no. UF1000-UB0840) is a matched set of guide bushings sized around the 8-40 screw thread, a size commonly used on larger sight bases, scope mounts, and receiver hardware. Forster Products builds the set so the correct drill and tap bushings are matched to each other for 8-40 work, keeping both operations on-axis instead of guessing at compatible bushings from separate sets. A wandering bit at this stage often means a misaligned mount that’s difficult to correct later. It’s a natural fit alongside the rest of our gunsmithing tools and gunsmith supplies for mount installation work.

Key Specifications

• 8-40 Thread Sizing Matched specifically to the drill and tap sizes needed for an 8-40 screw thread.
• Set Format Sold as a matched bushing set rather than a single bushing.
• Precision Fixture Use Meant to be used with a drill press or jig setup already in place.

Frequently Asked Questions

Is 8-40 a larger or smaller thread than 6-48? It’s a larger diameter thread, commonly used where more clamping strength is needed, such as larger scope mounts and receiver hardware.

Does this set include the tap itself? No, it’s a guide bushing set sized to work with a separately purchased 8-40 drill bit and tap.

Buy the Forster 8-40 Tap Bushing Set

Getting a mounting hole square and centered the first time saves a lot of rework. Order the Forster 8-40 Bushing Set from our Lubbock, Texas gun shop for fast, insured shipping to your bench.