Tap Drill Size Chart
| Bolt Size | Drill Size | Decimal (in) |
|---|---|---|
| 6-48 NS | #31 | 0.120 |
| 4mm-0.70mm | 3.4mm | 0.134 |
| 4mm-0.75mm | 3.4mm | 0.134 |
| 8-32 NC | #29 | 0.136 |
How are tap sizes measured?
Taps typically have several flutes constructed in its design. They are the grooves or valleys cut into the body of the tap. Higher numbers of flutes increase the strength of the tap and reduce space or chip flow. Thread size is the number of Threads Per Inch (TPI) which is measured along the length of the tap.
What is the diameter of a tap?
Downloadable versions:
| Tap size | Diameter (in) | Tap drill size |
|---|---|---|
| M6x1 | 0.2362 | 5 mm |
| 1/4-20 | 0.2500 | #7 |
| 1/4-28 | 0.2500 | #3 |
| M7x0.75 | 0.2756 | 6.2 mm |
What is the drill size for a 8 32 tap?
| To Tap This Size Screw Or Bolt: | Use This Drill Bit: | (Closest Fractional:) |
|---|---|---|
| 8-32 NC | #29 | – |
| 8-36 NF | #29 | 9/64″ |
| 8-40 NS | #28 | – |
| 3/16-24 NS | #26 | – |
What size hole is M8?
Metric Threads
| Thread | Drill size for tapping standard metric threads | Clearance hole |
|---|---|---|
| M4 | 3.3 | 4.5 |
| M5 | 4.2 | 5.5 |
| M6 | 5 | 6.6 |
| M8 | 6.8 | 9 |
Are taps a standard size?
Size Matters Most taps in the UK are said to be a standard size, but it’s worth remembering that the size refers to the way in which the tap fits onto the pipes rather than the size of the taps themselves (basin taps being 1/2″ and bath taps having 3/4″ threads).
What is the purpose of the tap size chart?
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 shown in both English and Metric units. Fractional sizes are listed in inches, while metric sizes are listed in millimeters following the letter “M”.
What are the sizes of metmetric tap charts?
Metric Tap Chart Aluminum, Brass, Plastics Steel, Stainless Steel, Iron Close Fit Standard Fit Standard Fit M9 x 1.0 9 1.0 8.00 O M10 x 1.5 10 1.5 8.5 R M10 x 1.25 10 1.25 8.8 11/32 M22 x 1.5 22 1.5 20.5 13/16
What is a chamfer taper taper tap?
Taper-chamfer taps have 7-10 chamfered threads at the tip for cutting into the workpiece. They require less torque than other chamfer types, making them a good choice for starting threads and tapping through holes.
