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Weaver 6-48 Sight Screw Counterbore - Weaver 6-48 Counterbore
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
$23.98
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SKU: 080672640
Overview
Built for fitting popular sight screws, this counterbore is intended for precise work on sight base installations and related gunsmithing tasks. It is made from high-speed steel and built to the stated specification for most sight base screws, with a 45-degree shoulder and the listed pilot dimensions for controlled setup. The tool calls for a No. 28 drill for the pilot hole, so it is suited to users who already have the proper drilling and fitting process in place. For serious rifle work where screw fit and clean recessing matter, it offers a straightforward, purpose-made option without unnecessary complexity.
Why Hunters Choose the Brownells
High-speed Steel
Construction for a durable shop
Made Exact
Spec for most sight base
Sized Popular
6-48 sight screw applications
Includes Pilot
Dimensions and 45-degree shoulder specification
Clear Drilling
Guidance: use No. 28 drill
Key Features
- High-speed steel construction.
- Made to exact specifications for most sight base screws.
- Designed for popular sight screws.
- Overall 2A 1/2 inches.
- Body diameter .218 inches with .137-inch pilot diameter.
- Includes 1/8-inch pilot length and 45-degree shoulder.
Best Used For
- Gunsmiths installing popular sight screws on compatible sight bases
- Users needing a counterbore made to exact specification for most sight base screws
- Workshops preparing drilled holes with a No. 28 pilot hole
- Those who want a high-speed steel tool for sight screw counterbore work
Specifications
| Body Diameter | .218'' |
|---|---|
| Material | High-Speed Steel |
| Overall Length | 2A 1/2'' |
| Pilot Diameter | .137'' |
| Pilot Length | 1/8'' |
| Recommended Drill Number | 28 |
| Shoulder Angle | 45deg |
| Specification | Made To Our Exact Spec For Most Sight Base Screws |
| Use | For Popular Sight Screws |
Pros
- High-speed steel construction for a durable shop tool
- Made to exact spec for most sight base screws
- Sized for popular 6-48 sight screw applications
- Includes pilot dimensions and 45-degree shoulder specification
- Clear drilling guidance: use No. 28 drill for pilot hole
Considerations & Trade-offs
- Designed for 6-48 sight base screws, so it is a specialized tool rather than a general-purpose counterbore.
- The pilot hole requires Drill No. 28, which adds a setup step if that bit is not already on hand.
- Its dimensions are fixed to the listed spec, so fit is tied to the intended screw and application rather than broad compatibility.
- The product information does not include a sheath, case, or other storage accessory, so organization and protection are up to the user.
Suggested Comparisons
- Sight screw counterbores
- Sight installation tools
- Gunsmithing drill bits and pilots
- Firearm maintenance tools
Suggested Accessories
- Honing stone
- Cleaning brush
- Gun vise
- Thread locker
Frequently Asked Questions
What is this Weaver 6-48 Sight Screw Counterbore used for?
It is a counterbore made for popular sight screws, and the product description says it is made to the exact specification for most sight base screws.
What material is the counterbore made from?
The short description identifies it as High-Speed Steel.
What dimensions are listed for this counterbore?
The listed dimensions are: overall 2A 1/2'', body diameter .218'', pilot diameter .137'', pilot length 1/8'', and a 45-degree shoulder.
What drill size should be used for the pilot hole?
The long description says to use Drill No. 28 for the pilot hole.
Who makes this counterbore?
The long description lists the manufacturer as Brownells.