Thread Cutting Screws Explained: Types, Uses, and Best Practices

Monster Bolts is excited to introduce four essential types of thread cutting screws: Type 1, Type F, Type 23, and Type 25. These specialized screws tap their own threads in pre-drilled holes, ideal for secure and robust fastening in metal, wood, and certain plastics. Discover how each type is unique and which one suits your specific project.

Types of Thread Cutting Screws

🔩 Type 1 – Single Edge Fine Threads

• Threads: Fine machine screw thread
• Point: Blunt tapered tip
• Cutting Edge: Single, straight cutting edge
• Commonly Known As: Type D
• Ideal For: Thin metal sheets, precise fastening jobs requiring fine threads.

🔩 Type F – Multiple Cutting Edges with Coarse Threads

• Threads: Coarse machine screw thread
• Point: Blunt tapered tip
• Cutting Edge: Multiple straight cutting edges for efficient cutting
• Ideal For: Thicker metals, harder materials, and applications needing high strength and durability.

🔩 Type 23 – Triangular Edge for Chip Clearing (Fine Threads)

• Threads: Fine machine screw thread
• Point: Blunt tapered tip
• Cutting Edge: Triangular shape facilitates easy chip clearing
• Commonly Known As: Type T
• Ideal For: Applications demanding precise threads and clean cutting in denser materials.

🔩 Type 25 – Enhanced Chip Clearing (Coarse Threads)

• Threads: Coarse machine screw thread
• Point: Blunt tapered tip
• Cutting Edge: Larger triangular cutting edge designed for aggressive chip removal
• Commonly Known As: Type BT
• Ideal For: Heavy-duty fastening in thick materials where clean and robust threads are essential.

Best Practices When Using Thread Cutting Screws

• Always Drill a Pilot Hole: Ensure the correct pilot hole size is drilled, matching screw specifications, for optimal thread formation and reduced risk of damage.
• Use Proper Installation Tools: Utilize high-quality screwdrivers or power tools to avoid stripping screw heads or damaging materials.
• Clear Chips Regularly: Periodically clear chips from holes, especially when using Types 23 and 25, to prevent clogging and ensure clean threads.
• Select Appropriate Thread Type: Fine threads are preferable for thinner materials and precision tasks; coarse threads handle thicker, tougher materials better.
• Inspect Material Compatibility: Confirm material compatibility—thread cutting screws excel in metals and hardwoods but are less ideal in soft plastics.

Find Your Thread Cutting Screws at Monster Bolts

Monster Bolts provides a wide selection of thread cutting screws, available in various sizes and finishes, perfect for your project needs. Visit our full thread cutting screw collection here.

Frequently Asked Questions (FAQs)

• Q: Can I use thread cutting screws in plastic?
  A: Generally, thread forming screws or Plastite® screws are better suited for plastics. Thread cutting screws are more effective in harder materials like metals and wood.
• Q: How important is the pilot hole size?
  A: Crucial. An improperly sized pilot hole can result in weakened threads or damage. Always follow recommended sizes for the best results.
• Q: What's the difference between thread cutting and thread forming screws?
  A: Thread cutting screws remove material, creating clean threads. Thread forming screws reshape existing material without removal. Cutting types are preferred in harder, more durable materials.