Irwin 7/16"-20 NF HCS Fractional Tap - Carded (8140)

The Irwin 7/16"-20 NF HCS Fractional Tap - Carded (8140) is a specialized tool engineered for hand-threading applications. This particular model, the 8140, is designed to create a 7/16-inch diameter thread with 20 threads per inch, adhering to the National Fine (NF) thread standard. It is a fundamental tool for professionals and hobbyists alike who perform routine maintenance, repair work, or rethreading tasks. Constructed from high carbon steel, this tap offers a balance of hardness and toughness, ensuring it can withstand the demands of threading a variety of materials.

KEY FEATURES AND BENEFITS:

• Effective Thread Creation: Designed to precisely cut 7/16"-20 NF threads, making it ideal for standard maintenance and repair tasks.
• Optimal for Hand Use: Engineered specifically for manual threading, offering control and versatility for various work environments.
• Efficient Chip Removal: The four straight flutes are ground to rapidly clear chips, preventing blockages and ensuring a cleaner, more efficient threading process.
• Versatile Application: Well-suited for rethreading stripped fasteners or creating new threads in a wide range of materials where high accuracy is not the primary concern.
• Reliable Performance: Constructed from high carbon steel, it provides consistent performance and is a dependable addition to any tool collection.
• Common Thread Standard: Produces a class 2B thread, a widely used and accepted standard for general-purpose fastening.

SPECIFICATIONS:

• Product Type: Fractional Tap
• Model Number: 8140
• Material: High Carbon Steel (HCS)
• Thread Size: 7/16"-20 NF
• Chamfer Type: Plug Tap (3-5 thread chamfer)
• Flute Type: Straight
• Number of Flutes: 4
• Thread Class: 2B
• Packaging: Carded, 1 tap included

HOW TO USE:

1. Prepare the Hole: Drill a hole to the correct tap drill size for a 7/16"-20 thread. Ensure the hole is clean and free of burrs.
2. Lubricate the Tap: Apply a suitable cutting fluid or tapping oil to the tap and the hole. This reduces friction and heat, extending the life of the tap and improving thread quality.
3. Start the Tap: Place the tap into the hole, ensuring it is perfectly straight. Begin turning the tap clockwise slowly and with light pressure.
4. Cut the Thread: After a turn or two, reverse the tap a quarter turn to break off the chips. Continue turning clockwise, reversing every half to full turn to clear chips.
5. Finish Tapping: Continue this process until the desired thread depth is reached. Be careful not to force the tap, as this can cause it to break.
6. Remove and Clean: Once finished, carefully back the tap out of the hole. Clean the newly cut threads of any remaining chips and cutting fluid.

BENEFITS OF USING IRWIN 7/16"-20 NF HCS FRACTIONAL TAP - CARDED (8140):

• Provides a straightforward and practical solution for common threading needs.
• High carbon steel construction ensures durability during regular use.
• Plug tap design offers versatility for most applications, whether creating new threads or repairing existing ones.
• Straight flutes minimize clogging by efficiently removing chips for a smoother tapping process.
• Creates class 2B threads suitable for most general-purpose fastening needs.
• Reliable choice for repair and maintenance tasks where time and efficiency are important.

FEATURES:

• Right-hand thread direction for standard clockwise turning to cut threads.
• High carbon steel composition provides a hard cutting edge for effective threading in various materials.
• Plug tap design with a 3 to 5-thread chamfer for easy starting in most hole types.
• Four straight flutes ground to quickly and effectively remove metal chips from the cutting area.
• Produces a class 2B thread suitable for non-critical, general-purpose fastening and assembly.
• Designed for manual application, allowing for precise control during the threading process.