Irwin Hanson 80221 10-32 NF Tap and No. 21 Drill Bit Combo Set

The Irwin Hanson 80221 is a convenient tap and drill bit combination set designed for creating 10-32 NF (National Fine) threaded holes. This matched set eliminates guesswork by pairing the correct size No. 21 drill bit with a 10-32 plug tap, ensuring proper thread formation and fit.

Key Features:

• High-speed steel (HSS) drill bit delivers fast, precise drilling with clean holes
• High carbon steel plug tap ideal for general-purpose threading applications
• 10-32 NF thread specification for fine-pitch threading requirements
• No. 21 drill bit (0.159" diameter) provides correct pilot hole size for optimal thread engagement
• Plug tap design suitable for through holes and blind holes with adequate depth
• Matched set ensures compatibility and eliminates size selection errors

This combo set is perfect for maintenance, repair, and fabrication work where 10-32 fine threads are required. The high-speed steel drill bit provides durability and heat resistance, while the high carbon steel tap offers the hardness needed for clean, accurate thread cutting in a variety of materials.