Irwin 4-48 NF Taper Bulk HCS Machine Screw Tap (1013)

The Irwin 4-48 NF Taper Bulk HCS Machine Screw Tap (1013) is a precision tool designed for creating internal threads by hand. Made from High Carbon Steel (HCS), this tap is built to handle a variety of materials and is a perfect addition to any toolkit for maintenance, repair, and rethreading tasks. The 4-48 NF specification indicates it is sized for a #4 machine screw with a fine thread pitch of 48 threads per inch. This combination of size and thread pitch is a standard in many mechanical applications. Its tapered design with a long chamfer (8-10 threads) makes it easy to start threads straight and true in through-holes, minimizing the risk of misalignment and ensuring a smooth, clean cut. The tap's straight flutes are engineered to efficiently remove chips as you work, preventing clogging and making the threading process more reliable. It is specifically intended for hand threading and is ideal for jobs where a general-purpose Class 2B thread fit is needed, as it is not intended for high-tolerance, precision threading. The tool itself is clearly etched with its size and recommended drill bit information, allowing for easy identification.

KEY FEATURES AND BENEFITS:

• Reliable Performance: Creates clean, accurate threads suitable for general-purpose use.
• Durable Construction: Made from High Carbon Steel for strength and longevity.
• Easy Thread Starting: Tapered design with a long chamfer helps start threads straight.
• Efficient Chip Removal: Straight flute design clears chips effectively to reduce breakage risk.
• Versatile Thread Fit: Produces a Class 2B thread fit for a wide range of standard fasteners.
• Hand Use Design: Optimized for use with a tap wrench for manual threading.

SPECIFICATIONS:

• Size: 4-48 NF (National Fine)
• Material: High Carbon Steel (HCS)
• Thread Fit: Class 2B
• Tap Style: Taper (8-10 thread chamfer)
• Flute Type: Straight Flute
• Capacity: Suitable for #4 machine screws with 48 threads per inch

HOW TO USE:

1. Drill the Hole: Drill a hole to the correct size for a 4-48 NF tap, ensuring it is straight and clean.
2. Align the Tap: Place the tap in a tap wrench and align it vertically with the drilled hole.
3. Start the Thread: Apply light pressure and turn the tap wrench clockwise to begin threading.
4. Clear Chips: After every half to full turn, reverse a quarter turn to break and clear chips.
5. Continue Tapping: Turn clockwise, reversing periodically until the desired depth is reached.
6. Remove the Tap: Turn counter-clockwise to carefully back the tap out of the threaded hole.

BENEFITS OF USING IRWIN 4-48 NF TAPER BULK HCS MACHINE SCREW TAP (1013):

• Reliable for Repairs: Designed for routine maintenance and rethreading jobs.
• User-Friendly Taper Design: Helps start threads straight, ideal for new users.
• Efficient Chip Management: Straight flutes clear chips quickly, reducing breakage risk.
• High Carbon Steel Construction: Offers a strong balance of hardness and toughness.

FEATURES:

• Durable High Carbon Steel build for long-lasting performance in hand tapping.
• 4-48 NF thread size designed for #4 machine screws with fine threading.
• Etched size markings for fast and easy identification.
• Ideal for manual threading applications with a tap wrench.
• Usable on a variety of common materials for broad applicability.