1/2-28 UNEF Right-Hand HSS Tap and Die Set for Precision Thread Repair
Let Northline Parts Do the Heavy Lifting for You!
Not sure which part you need? Our team can help you find the right replacement.
Parts Support Hours: Monday–Friday, 8:00 AM–5:00 PM CT
Live Chat: Available 24/7
I reached out for some replacement head bolts and they responded quickly with a few questions and cautionary information and is sending me some bolts. Great customer service! Thanks
Edward H. — Verified customer
Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
- Workpieces specified for 1/2-28 UNEF right-hand threads
- Compatible .22 LR, .223, and 5.56 firearm applications requiring 1/2-28, when serviced legally and professionally
- Select 9mm applications specifically machined for 1/2-28
- General precision-machining projects using the same thread standard
Product Overview
A damaged muzzle-device thread, worn fastener, or custom-machined component may require cleaning, chasing, or creating a precise 1/2-28 UNEF thread. The matched tap and die provide both internal and external thread tooling for correctly prepared workpieces.
Threading safety-critical or regulated components requires skill, proper alignment, measurement, and compliance with all laws. A die cannot correct a bent, undersized, off-center, or improperly shouldered barrel, and professional gunsmithing is recommended for firearm work.
Key Features & Performance
- Matched 1/2-28 UNEF right-hand tap and die
- High-speed-steel cutting tools
- Useful for thread creation, chasing, and repair
- Fine 28-thread-per-inch profile
Common Uses
- Chasing lightly damaged 1/2-28 external threads
- Cutting matching internal threads in correctly drilled material
- Restoring a compatible precision fastener
- Supporting professional fixture-based machining work
Technical Specifications
- Product Type: Tap and die set
- Thread: 1/2-28 UNEF
- Direction: Right hand
- Material: High-speed steel
- Tools Included: Tap and die
Installation & Fitment
- Verify the required thread standard with gauges or manufacturer data
- Secure and align the workpiece using proper fixtures
- Use suitable cutting fluid and reverse periodically to clear chips
- Inspect finished threads and shoulder alignment before assembly
Compatibility Notice
Never work on a loaded firearm. Follow all applicable laws and manufacturer procedures; professional gunsmith installation is strongly recommended for firearm components.
Frequently Asked Questions
Q: Is 1/2-28 the same as 1/2-20? A: No. The thread pitch differs and the tools are not interchangeable.
Q: Can the die align crooked existing threads? A: No. It follows the path presented and can worsen misalignment without proper fixturing.
Q: Does caliber alone confirm thread size? A: No. Measure and verify the manufacturer's specification.
Part Summary
keywords: 1/2-28 UNEF tap die set, right hand fine thread tool, HSS 28 TPI threading set, 1/2-28 thread repair, precision muzzle thread die, internal external thread cutter, 223 5.56 thread tool, professional gunsmith tap die
Brand names, model numbers, and reference part numbers are used for identification and compatibility purposes only. Verify the original component, dimensions, and application before purchase.