Irwin 4-40 NC Carded HCS Machine Screw Tap (8012)

The Irwin 4-40 NC Carded HCS Machine Screw Tap (8012) is a fundamental tool for creating new internal threads or restoring damaged ones. Crafted from high-carbon steel, this tap is built for general-purpose hand threading and offers consistent performance for a variety of tasks. The plug tap style is the most versatile for a wide range of applications, featuring a chamfered end that helps in starting the thread easily. With its 4-40 NC thread size and 40 threads per inch, this tap is suitable for standard machine screw applications. The three straight flutes are specifically designed to facilitate efficient chip removal, which is crucial for producing clean, accurate threads. Whether you are performing routine maintenance, tackling a repair project, or working on a new build, this Irwin tap provides a reliable and straightforward solution for your threading needs. The single tap is packaged on a card, making it easy to store and identify.

KEY FEATURES AND BENEFITS:

• Reliable Threading: The #4-40 NC size and 40 TPI allow you to create or repair standard internal threads, which is essential for a variety of mechanical and assembly tasks.
• High-Carbon Steel Construction: The High Carbon Steel (HCS) material provides good wear resistance and longevity, ensuring the tap can withstand repeated use.
• Efficient Chip Removal: The tap's three straight flutes are designed to effectively clear chips and debris from the threading area, preventing clogging and ensuring a smoother, more accurate cut.
• Versatile Plug Tap Design: The plug tap style is ideal for general-purpose use, as it can be used for both through-holes and blind holes where the hole is deep enough.

SPECIFICATIONS:

• Brand: Irwin
• Model Number: 8012
• Thread Size: #4-40 NC
• Threads Per Inch (TPI): 40
• Tap Style: Plug Tap
• Material: High Carbon Steel (HCS)
• Flute Type: Straight Flute
• Number of Flutes: 3

HOW TO USE:

1. Preparation: Drill a hole in the material using the correct size drill bit for a #4-40 NC thread. Ensure the hole is clean and free of debris.
2. Lubrication: Apply a suitable cutting fluid or lubricant to the tap and the hole to reduce friction and heat, which will extend the life of the tap and improve the thread quality.
3. Starting the Thread: Place the tap in the hole, ensuring it is perpendicular to the surface. Use a tap wrench to turn the tap clockwise, applying gentle downward pressure to start the thread.
4. Cutting the Thread: Once the tap is started, continue turning it clockwise for a half to one full turn.
5. Chip Removal: Turn the tap counter-clockwise for about a half turn to break and clear the chips from the cutting area. This is a critical step to prevent the tap from binding or breaking.
6. Finishing: Repeat the process of turning clockwise and then counter-clockwise until the tap has created the desired thread depth.

BENEFITS OF USING IRWIN 4-40 NC CARDED HCS MACHINE SCREW TAP (8012):

• Ease of Use: The straightforward design and common plug tap style make it simple for both beginners and experienced users to create clean threads.
• Cost-Effective: This single, carded tap is an affordable solution for specific threading needs without having to purchase a complete tap and die set.
• High Reliability: The quality materials and construction from a reputable brand like Irwin ensure that this tool delivers reliable performance.

FEATURES:

• Single, carded machine screw tap
• Standard #4-40 NC thread size
• 40 threads per inch
• Three straight flutes for effective chip removal
• Made from high-carbon steel
• Plug tap design with a chamfered tip
• Suitable for hand threading applications
• Creates a class 2B thread
• Right-hand thread direction