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Heli-Coil taps in various types and styles produce holes for Tolerance Classes 4H5H or 3B and 5H or 2B for use in the general range of aluminums, magnesiums, mild steels, free machining stainless steels and other free machining materials.

The tap size chart provides a list of standard size taps, specifying the diameter and thread spacing, for fractional, metric, and screw sizes. The decimal equivalents of the diameters are …

HeliCoil metric drill sizes, charts, and specifications for various insert lengths and screw thread inserts.

Tap Chart Metric Threads

Choose from our selection of reference charts, tap and drill reference rulers, drill bit size identifiers, and more. Same and Next Day Delivery.

Example: M8 tap drill size 8mm - 1.25 mm = 6.8mm (M8 tap drill size) A distinction is made between standard threads and fine threads for the drill size diameter. The tap drill size table here shows the core hole size for metric standard threads. The thread tap drill size table for fine threads can be found here.

Metric Tap and Drill Bit Size Table ... 8531 S. Freeway Drive • Macedonia, Ohio 44056 (800) 232 - 2659 • Fax: (330) 468–3302 www.scfastening.com

ISO metric tapping and clearance drills, coarse thread series.

Recommended clearance holes and drill tap sizes. Clearance holes for metric bolts: Nominal diameters according ISO 724 - Metric Threads. Bolts, nuts and threaded rods - torque, tension …