METRIC FINE TAPS

Sutton Tools metric fine taps are premium-quality threading tools designed to cut highly precise internal metric fine threads (MF). Depending on your project requirements, Sutton produces these taps across two primary material ranges: Carbon Alloy Steel for light maintenance or DIY tasks, and High-Speed Steel (HSS) for industrial fabrication and machine tapping.

• MF: Stands for Metric Fine. This indicates that the thread belongs to the metric system but has a finer pitch (closer threads) than a standard metric coarse thread. 
• 10: Represents the Nominal Diameter (10 mm). This is the major, outer diameter of the thread bolt or the size of the hole before cutting the internal threads.
• 1.25: Represents the Pitch (1.25 mm). This is the exact linear distance from the crest of one thread to the crest of the next. For comparison, a standard coarse M10 thread has a wider pitch of 1.5 mm.

• Design: Features a long, gradual lead-in chamfer spanning 7 to 10 threads.
• Purpose: It aligns the tool perfectly straight and starts cutting the thread with minimal effort.
• Best For: Starting any manual threading project or threading completely through open holes. 

• Design: Features a moderate lead-in chamfer spanning 3 to 5 threads.
• Purpose: It deepens the initial grooves cut by the taper tap and drives the thread closer to the floor of a hole.
• Best For: Deepening threads or acting as a single-pass starter tap in softer materials or open through-holes. 

• Design: Features a very short chamfer of only 1 to 2 threads, making it almost flat at the cutting tip.
• Purpose: It cuts a full, usable thread all the way down to the absolute flat bottom of a blind hole.