## What size drill do I need for a 3/4 tap?

Tap and Drill Size Chart

9/16-12 .4844 31/64
5/8-11 .5312 17/32
3/4-10 .6562 21/32
7/8-9 .7656 49/64

### What is the tap drill size for a 3/4 10 Unc?

21/32
Tap, Drill, & Clearance Hole Sizes Chart

Size DIA
3/4-10-UNC 21/32 .6562
3/4-16-UNF 11/16 .6875
7/8-9-UNC 49/64 .7656

What drill bit is closest to 3 4?

Jobber Length Drill Bit Chart

Fractional Sizes Decimal Equivalent (Inches) Flute Length (Inches)
1/64” 0.0156 3/16”
1/32” 0.0312 1/2”
3/64” 0.0469 3/4”
1/16” 0.0625 7/8”

How many mm is a 3/4 tap?

24.5 mm

Nominal Size (inches) T P I Tapping Drill Size
3/4 14 24.5 mm
31/32″
7/8 14 28.25 mm
1-7/64″

## What does UNC and UNF mean?

The most common types of UN (Unified National) thread are: UNC – Unified National Coarse Thread, comparable with the ISO metric thread. UNF – Unified National Fine Thread.

### How do you calculate UNC tap drill size?

For Imperial (inch) threads the tapping drill size is calculated in the same way, diameter minus pitch. eg for 3/4.10 UNC pitch = 0.1, diameter = 0.75, tapping drill = 0.65 = 16.5mm.

What is a number 7 drill bit?

A number 7 drill bit is 0.2010 inches. As a fraction, the 0.2010 decimal is 201/1000.

How do you determine tap drill size?

As a rule of thumb, for Metric threads, the tapping drill can be calculated by subtracting the pitch from the diameter of the thread. eg for an M5x0. 75 thread the tapping drill is 5-0.75mm = 4.25mm. For Imperial (inch) threads the tapping drill size is calculated in the same way, diameter minus pitch.