Professional 20-Piece Metric Tap and Die Set | High-Strength Alloy Steel (Bearing Steel) | M3-M12 Essential Thread Repair Kit for DIY & Home Workshop

1. Product Introduction

The 20-Piece Metric Tap and Die Set is the ultimate repair companion for every garage, workshop, and maintenance kit. Designed for the DIY enthusiast who demands precision without the industrial price tag, this set is crafted from high-performance Bearing Steel (Alloy Steel).

Whether you are restoring a rusted bolt on a classic car, fixing a stripped thread on household plumbing, or creating custom parts for a weekend project, this set provides the durability and accuracy needed to get the job done right the first time.

2. Technical Specifications Matrix

3. Customer Concerns & Engineered Solutions

• Concern: Tools breaking or dulling after a few uses.

  • Solution: We use premium Bearing Steel that undergoes a specialized vacuum heat-treatment process. This results in a hardness of 58-62 HRC, providing the perfect balance: hard enough to maintain a sharp edge, but tough enough to resist snapping during manual operation.

• Concern: Difficulty in starting the thread straight.

  • Solution: Our dies feature a double-sided leading chamfer, which helps the tool self-center on the rod. Our taps are Plug Style (with a 3-5 thread lead), reducing initial torque and making it much easier for DIYers to start a straight cut.

• Concern: Inaccurate thread fit.

  • Solution: Every tool is fully ground (not just rolled) to meet strict 6H Metric tolerances. This ensures a snug, vibration-resistant fit for your fasteners every time.

• Concern: Losing small tools in a messy workshop.

  • Solution: The set comes in a rugged, labeled storage case. Each tool has its own dedicated slot, ensuring your precision edges are protected and you never lose a piece.

4. Primary Product Applications

• Automotive Repair: Cleaning out corroded engine block holes, restoring rusted wheel studs, and repairing stripped threads on brackets.

• Household Maintenance: Fixing damaged threads on lawnmowers, bicycles, furniture bolts, and outdoor plumbing fixtures.

• DIY & Prototyping: Ideal for makers working with aluminum, brass, and mild steel for custom bracketry or robotics.

5. FAQ (Technical Support)

Q: Can these tools be used on Stainless Steel?

A: This set is optimized for mild steel, copper, aluminum, and brass. While it can handle occasional use on softer stainless steel, we recommend our HSS-E (Cobalt) series for consistent stainless steel production.

Q: What happens if I tap a hole without using oil?

A: Using the tools "dry" significantly increases friction and heat, which will dull the cutting edges faster and may cause the tool to seize. Always use a drop of cutting oil or general-purpose lubricant.

Q: Why is there an M7 and M9 size included?

A: While less common than M6 or M8, M7 and M9 are frequently found in specialized European automotive components and older machinery. We include them to ensure your kit is truly "all-in-one."