Ground Thread Spiral Point (Gun Taps) CHip Driver Machine Screw, 1/4" - 20 NC HAN333310 Hanson

Features and Benefits:

• Engineered specifically for tapping "through" holes
• Designed to .0005" pitch tolerance
• Cuts with a shearing action that shoots the chips ahead of the tap, producing a cleaner thread
• Recommended for production use in machine tools