Irwin 8-40 NS HCS Machine Screw Tap (1026)

The Irwin 8-40 NS HCS Machine Screw Tap (1026) is a professional-grade tool designed for creating and rethreading machine screw threads. Built with high carbon steel, this tap offers a balance of hardness and toughness, making it suitable for a variety of hand-threading applications. Its precision-ground straight flutes are engineered to efficiently clear chips and debris, ensuring clean and accurate threads with every use. The tap's taper chamfer is a key feature, providing a gradual start that reduces the force needed to begin threading, making it easier to align and start the tap correctly. This tool is an essential addition to any toolbox for maintenance, repair, and general-purpose work where creating or restoring #8-40 NS threads is required. Its durable construction and thoughtful design make it a reliable choice for professionals and DIY enthusiasts alike who need consistent, quality results.

KEY FEATURES AND BENEFITS:

• Precision Threading: The #8-40 NS thread size is precisely cut to meet Class 2B thread tolerance standards, ensuring a consistent fit for screws and bolts. This makes it ideal for a wide range of repair and assembly tasks.
• Easy Starting: The long taper chamfer, featuring 8 to 10 threads, allows for a gradual and smooth start into the material. This reduces the risk of cross-threading and minimizes the torque required to begin cutting, making it easier to use by hand.
• Effective Chip Removal: The four straight flutes are specifically designed to channel chips out of the hole as the tap turns. This prevents the buildup of debris, which can jam the tap and cause breakage, resulting in a cleaner and more efficient threading process.
• Versatile Application: Constructed from high carbon steel, this tap is suitable for threading a variety of common materials. It's a reliable choice for general-purpose applications, from routine maintenance to rethreading stripped holes.

SPECIFICATIONS:

• Thread Size: #8-40 NS (National Standard)
• Material: High Carbon Steel (HCS)
• Chamfer Type: Taper
• Number of Flutes: 4
• Flute Type: Straight
• Thread Direction: Right-Hand
• Thread Tolerance: Class 2B
• Product Includes: One (1) Irwin 8-40 NS HCS Machine Screw Tap

HOW TO USE:

1. Drill the Hole: Drill a pilot hole using the appropriate size drill bit for a #8-40 NS tap. The recommended drill size is often etched on the tap itself for easy reference.
2. Lubricate: Apply a suitable cutting fluid or lubricant to the tap and the hole to reduce friction, extend the tool's life, and produce a smoother finish.
3. Start Tapping: Position the tap perpendicular to the material, apply light, even pressure, and begin turning it clockwise using a tap handle.
4. Turn and Reverse: Rotate the tap clockwise a quarter to half turn, then reverse a quarter turn to break chips and clear flutes.
5. Continue Tapping: Repeat the forward and reverse process until the desired thread depth is achieved. Avoid forcing the tap to prevent breakage.
6. Remove Tap: Once threading is complete, turn the tap counterclockwise to remove it from the hole.

BENEFITS OF USING IRWIN 8-40 NS HCS MACHINE SCREW TAP (1026):

• Reliable Performance: High carbon steel construction ensures durability and maintains cutting edges through multiple uses.
• Improved Efficiency: Taper chamfer design allows for faster, easier starting, reducing time and effort.
• Clean Threads: Precision-ground straight flutes effectively remove debris, leaving clean threads.
• User-Friendly Design: Etched markings indicate size and drill bit for easy setup.
• Versatility: Ideal for creating or repairing #8-40 NS threads in various materials.

FEATURES:

• Durable high carbon steel build
• Four straight flutes for efficient chip removal
• Right-hand threading design
• Precision-ground geometry for accurate threads
• Etched size and drill bit markings on shank
• Tapered chamfer for smooth start
• Meets Class 2B tolerance standards
• Suitable for general-purpose hand threading