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Barrel Threading Lathe Bits - 5/16'''' Threading Bit, 60
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$16.99
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SKU: 080658256
Overview
These pre-shaped threading bits are designed for barrel threading work where a precise, ready-to-use cutter saves setup time. The 60-degree version features a left-offset cutter for the closest cut possible, and all types include clearance cuts. It is intended for threading barrels rather than general shop use, with the 5/16-inch square size listed among the available specifications. For gunsmiths working on compatible barrel-threading tasks, this is a straightforward tool choice when a correctly formed bit is needed.
Why Hunters Choose the Brownells
Pre-shaped Design
Helps save time during barrel
60-degree Threading
Bit includes a left-offset cutter
Clearance Cuts
Are included on all bit
Available Multiple
Square sizes: 1/4, 5/16, and
Sized Barrel
Threading applications on 03 Springfields,
Key Features
- Pre-shaped threading bit designed to save setup time
- 60-degree threading bit with cutter offset to the left
- Includes clearance cuts for threading work
- 5/16-inch square bit size
- Approximate length: 2 1/2 inches
- Brownells manufactured product
Best Used For
- Gunsmiths threading barrels for 60-degree thread profiles with a pre-shaped cutter
- Users needing a 5/16-inch square threading bit for barrel work
- Those fitting barrels where the cutter offset to the left is required
- Shop setups handling barrel threading for precision rifle and surplus-action projects
Specifications
| Clearance Cuts | Yes |
|---|---|
| Compatibility | Barrel threads for '03 Springfields and Enfields; 98 Mausers |
| Cutter Offset | Left |
| Length | Approximately 2 1/2'''' (6.4cm) long |
| Size | 5/16'''' (7.9mm) square |
| Thread Angle | 60deg |
| Thread Pitch | 10 tpi |
| Thread Type | Threading Bit |
Pros
- Pre-shaped design helps save time during barrel threading work
- 60-degree threading bit includes a left-offset cutter for closest cut possible
- Clearance cuts are included on all bit types
- Available in multiple square sizes: 1/4, 5/16, and 3/8 inch
- Sized for barrel threading applications on 03 Springfields, Enfields, and 98 Mausers
Considerations & Trade-offs
- This is a pre-shaped threading bit, so it is intended for a specific barrel-threading task rather than general-purpose lathe work.
- The 60° version has the cutter offset to the left for the closest cut possible, which means setup and orientation matter for correct use.
- The listed sizes are limited to square shank dimensions; confirm the 5/16" size matches your tooling before ordering.
- The product description does not include blade steel or other material details, so material-based comparisons cannot be made from the available data.
Suggested Comparisons
- Barrel threading tools
- Lathe threading bits
- Rifle barrel gunsmithing tools
- Thread cutting tool accessories
Suggested Accessories
- Threading die holder
- Cutting oil
- Thread pitch gauge
- Bench vise
Frequently Asked Questions
What is this threading bit used for?
It is a barrel threading lathe bit. The 60-degree threading bits have the cutter offset to the left for the closest cut possible, and all types include clearance cuts.
Which rifles does the product description specifically mention?
The description says square thread bits cut true 10 tpi square barrel threads for '03 Springfields and Enfields. It also says 55-degree threading bits are the correct bit when threading barrels for 98 Mausers.
What size is this specific bit?
The product title identifies it as a 5/16-inch threading bit. The specifications also list 5/16-inch as one of the available square sizes.
Does the listing provide exact dimensions for the bit?
Yes, the specs list the 5/16-inch square bit as approximately 2 1/2 inches long. The listing does not provide any other dimensions beyond that.
Is this a complete threading kit?
No. The data describes individual pre-shaped threading bits, not a complete kit. The listing does not mention any additional tools or accessories.