Irwin 10-32 NF HCS Bottom Machine Screw Tap – Bulk (1231ZR)

Description

The Irwin 10-32 NF HCS Bottom Machine Screw Tap – Bulk (1231ZR) is a specialized hand threading tool built for precision and reliability. Designed as a “bottom” tap, its primary function is to finish cutting threads to the very bottom of a blind, or non-through, hole. This makes it an indispensable tool for applications where full threading depth is critical. Crafted from durable high carbon steel (HCS), this tap provides consistent performance when creating new threads or cleaning out damaged ones in a variety of materials. The #10-32 NF sizing is a common machine screw standard, making this a versatile addition to any professional’s toolkit or a home workshop.

KEY FEATURES AND BENEFITS:

• Precision Threading: The bottom tap design allows for threads to be cut as close to the bottom of a blind hole as possible, ensuring maximum thread engagement and strength for fasteners.
• High Carbon Steel Construction: The High Carbon Steel (HCS) material provides good hardness and wear resistance, allowing the tap to maintain a sharp cutting edge and perform reliably over time.
• Versatile Application: This tap is ideal for a wide range of uses, from routine maintenance and repair work to rethreading stripped or damaged holes. Its standard #10-32 NF size makes it compatible with common machine screws.
• Optimal Performance: When used as part of a three-tap set (following a taper and plug tap), this tool guarantees a complete and professional finish to any internal threading project.

SPECIFICATIONS:

• Product Type: Machine Screw Tap
• Thread Size: #10-32 NF
• Tap Style: Bottom Tap
• Material: High Carbon Steel (HCS)
• Thread Class: 2B
• Number of Flutes: 4
• Recommended Drill Bit Size: #21

HOW TO USE:

1. Drill the Hole: Start by drilling a hole with the recommended #21 drill bit. Ensure the hole is straight and deep enough for the screw you plan to use.
2. Start with a Taper Tap: It is highly recommended to first use a taper tap (not included) to begin cutting the threads. This helps align the tap and remove the bulk of the material.
3. Use a Plug Tap: Follow with a plug tap (not included) to cut the threads deeper into the hole, preparing it for the final stage.
4. Finish with the Bottom Tap: Insert the Irwin 10-32 NF HCS Bottom Machine Screw Tap into the hole. Turn the tap clockwise, applying gentle, even pressure.
5. Clean Threads: After every couple of turns, rotate the tap a half turn counter-clockwise to break off and clear the chips. Continue this process until you feel the tap bottom out.
6. Remove the Tap: Carefully reverse the tap out of the hole. Clean the newly cut threads of any remaining chips before use.

BENEFITS OF USING IRWIN 10-32 NF HCS BOTTOM MACHINE SCREW TAP – BULK (1231ZR):

• Precise Fit: The National Fine (NF) thread standard ensures a tight, secure fit for screws, which is crucial in applications requiring high holding power.
• Professional Finish: When properly used, this bottom tap provides a complete thread form, which is essential for professional-grade work and reliable fastener engagement.
• Reliable for Repairs: It’s an excellent tool for fixing existing threads that are cross-threaded or damaged, saving time and the cost of replacing parts.
• Bulk Availability: The bulk packaging option is perfect for professionals who regularly perform threading work, ensuring you always have a replacement tap on hand.
• High-Quality Construction: The use of high carbon steel in its construction provides a good balance of hardness and toughness, making it a reliable choice for various threading tasks.

FEATURES:

• Short chamfer for cutting threads to the bottom of blind holes.
• Straight flute design for general-purpose threading.
• Machine screw tap dimensions compatible with standard #10-32 NF fasteners.
• Tapered lead threads allow for easy entry into the workpiece.
• Constructed from HCS for good strength and heat resistance.
• Designed to be used with a tap wrench for manual operation.