Irwin 4-40 NC HCS Machine Screw Plug Tap - Bulk (1112)

The Irwin 4-40 NC HCS Machine Screw Plug Tap - Bulk (1112) is a precision threading tool designed for creating accurate internal threads. Made from high carbon steel, this tap is built for reliability and longevity, making it an essential component for any toolbox. Its design is optimized for hand-threading applications, providing clean and consistent results whether you are repairing stripped threads or creating new ones. The #4-40 thread size and National Coarse (NC) standard make it the ideal tool for use with common machine screws, suitable for a wide variety of materials. This tool is a testament to quality craftsmanship, offering a straightforward and effective solution for professional tradespeople and serious hobbyists alike. It's a fundamental piece of equipment for maintenance, repair operations, and general-purpose threading tasks, ensuring a perfect fit and strong thread engagement every time.

KEY FEATURES AND BENEFITS:

• High Carbon Steel (HCS) construction: Offers superior hardness and wear resistance for extended tool life.
• Plug Chamfer design: Features 3-5 chamfered threads, suitable for both through-holes and blind holes.
• Straight flutes: Facilitate efficient chip removal, ensuring cleaner and more precise cuts.
• Right-hand cutting direction: Standard for most threading applications.
• Bulk packaging: Cost-effective for frequent users and professional workshops.

SPECIFICATIONS:

• Tap Size: #4-40
• Thread Standard: NC (National Coarse)
• Material: High Carbon Steel (HCS)
• Chamfer Style: Plug
• Number of Flutes: 3
• Cutting Direction: Right Hand
• Thread Class: 2B
• Recommended Drill Bit Size: #43

HOW TO USE:

1. Prepare the Hole: Drill a pilot hole using a #43 drill bit. Ensure the hole is clean and free of debris.
2. Align the Tap: Mount the tap in a suitable tap wrench. Place the tip of the tap into the pilot hole, making sure it is perfectly perpendicular to the material's surface.
3. Start Threading: Apply slight downward pressure and turn the tap wrench clockwise. The tap will begin to cut the threads.
4. Clear Chips: After every half-turn to one full turn, reverse the tap wrench a quarter turn counter-clockwise. This action breaks the chips and clears them from the cutting flutes, preventing the tap from binding or breaking.
5. Finish Threading: Continue turning the tap clockwise, reversing periodically to clear chips, until the desired thread depth is achieved. Remove the tap by turning it counter-clockwise.

BENEFITS OF USING IRWIN 4-40 NC HCS MACHINE SCREW PLUG TAP - BULK (1112):

• High-Quality Construction: Made from High Carbon Steel, this tap provides the reliability and edge retention needed for consistent performance.
• Versatile Application: The #4-40 NC threading is a common size, making this tap suitable for a wide array of projects involving small fasteners.
• Efficient Chip Management: Straight flutes are designed for effective chip removal, which contributes to a smoother and more accurate threading process.
• Ease of Use: This hand tap simplifies the process of creating or repairing internal threads, even for those with limited experience.
• General Purpose: The plug chamfer makes it an excellent choice for a variety of applications, from new threading to correcting damaged threads.

FEATURES:

• Three straight flutes for effective chip flow.
• Precisely ground cutting edges for clean thread formation.
• Plug chamfer with 3-5 chamfered threads for general applications.
• Manufactured from durable High Carbon Steel (HCS).
• Right-hand cut for standard threading direction.
• Designed for use with a tap wrench for manual operation.
• Creates National Coarse (NC) threads for #4 screws.
• Bulk packaging for cost-efficiency.