Description
Irwin 8-32 NC Taper Bottom Bulk HCS Machine Screw Tap (1224ZR) is a precision threading tool crafted for creating standard 8-32 NC threads. This tap is an essential component for any toolbox, suitable for professionals and DIY enthusiasts engaged in a variety of repair and fabrication tasks. Made from high carbon steel, it provides a solid balance of hardness and toughness, making it effective for hand-threading work in a wide range of materials. Its design focuses on practicality and efficiency, with a bottoming chamfer that allows it to create threads all the way to the base of a blind hole, a task where other tap types fall short. The four straight flutes are a key feature, engineered to provide rapid chip removal and prevent material buildup, which is critical for producing clean and accurate threads.
KEY FEATURES AND BENEFITS:
- Creates Standard 8-32 NC Threads: Designed specifically for a common machine screw size, ensuring compatibility with many fasteners and applications.
- High Carbon Steel Construction: Provides hardness and toughness ideal for manual threading use.
- Bottoming Chamfer for Blind Holes: Short tapered lead (1-2 threads) enables threading to the bottom of blind holes.
- Efficient Chip Removal: Four straight flutes quickly and cleanly remove chips, preventing clogging and ensuring smooth threading.
- Class 2B Thread Fit: Produces a standard general-purpose fit suitable for most applications.
SPECIFICATIONS:
- Manufacturer’s Part : 1224ZR
- Thread Size: 8-32 NC
- Number of Flutes: 4
- Material: High Carbon Steel
- Thread Direction: Right Hand
- Tap Chamfer: Bottoming
- Measurement Type: Inch
- Surface Finish: Bright/Uncoated
HOW TO USE:
- Preparation: Ensure hole is correctly sized using a 29 drill bit for 8-32 NC threads; clean out any debris.
- Lubrication: Apply cutting fluid or tapping lubricant to reduce friction and improve thread quality.
- Starting the Tap: Place tap straight into hole and use a tap wrench to apply even downward pressure while turning clockwise.
- Cutting the Threads: Turn clockwise a half to full turn, then back off a quarter turn to break chips and prevent binding.
- Finishing the Thread: Continue the forward-and-reverse motion, periodically removing the tap to clear chips, until desired depth is reached.
BENEFITS OF USING IRWIN 8-32 NC TAPER BOTTOM BULK HCS MACHINE SCREW TAP (1224ZR):
- Reliable performance meeting Irwin Hanson’s quality standards.
- Versatile use across many materials and applications.
- Bottoming design enables full threading at the base of blind holes.
- Smooth tapping process with efficient chip removal minimizes binding and cross-threading.
FEATURES:
- High carbon steel construction for durability and effective cutting.
- Precisely ground straight flutes for clean, fast chip removal.
- Bottoming chamfer to cut full threads at the base of blind holes.
- Standard 8-32 NC thread size for broad compatibility.
- Produces a general-purpose Class 2B thread fit.
- Right-hand thread direction.
- Uncoated bright finish for general use.








