# What size hole do you drill for 1/4 inch?

## What size hole do you drill for 1/4 inch?

The chart below shows drill sizes up to 1 inch in diameter….

Screw Size-TPI Recommended Hole Diameter Drill Bit Size
1/4-20 0.2280″ #1
5/16-18 0.2900″ L
3/8-16 0.3580″ T
1/2-13 0.4531″ 29/64″

What drill bit do I use for a 1/4 tap?

You can get away with a 1/8 inch drill for a 1/4-20 tap in a pinch….What size drill bit do I need for a 1/4 20 tap?

Tap Fractional Drill Bit Number Drill Bit
1/4″-28 7/32″ 3
5/16″-18 17/64″

### What size drill bit do I need for 1/4-20 tap?

13/64″
US Tap and Drill Bit Size Table

Tap Fractional Drill Bit Number Drill Bit
1/4″-20 13/64″ 7
1/4″-28 7/32″ 3
5/16″-18 17/64″
5/16″-24

What size is R drill?

Letter Size Drills

Ltr. Dia.
O .316
P .323
Q .332
R .339

#### What size drill bit do I need for 1/4 20 tap?

How do you drill and tap a 1/4 20 hole?

How to Drill & Tap for a 1/4-20 Bolt

1. Measure the location needed for the 1/4-20 tapped hole.
2. Set the point of the center punch on the location of the hole to be tapped.
3. Insert the drill bit into the drill.
4. Apply pressure to the drill.
5. Insert the 1/4-20 tap into the tee handle.
6. Attach the flapper wheel to the grinder.

## How big of drill bit do I need for a 1 / 4 pipe tap?

Then, looking up above at the “Decimal Equivalent Chart” section, an “F” drill measures 0.257″, about halfway between 1/4″ and 17/64″. Similarly one may ask, what size drill bit do you use for a 1/4 pipe tap?

How big is a 1 / 4 NPT tap hole?

NPT Size Tap Drill Size (in.) (Decimal) (in.) 1/4 – 18: 7/16 (0.438) 3/8 – 18: 9/16 (0.562) 1/2 – 14: 45/64 (0.703) 3/4 – 14: 29/32 (0.906)

### How big is a 1.2 inch tap?

not present TAP SIZE TAP SIZE CUTTING TAPS CUTTING TAPS 1-1/2- 6 1-11/3 2 1.3438 1-1/2-12 1-27/64 1.4219 M39 X 4.00 35.00mm 1.3780 M39 X 3.00 36.00mm 1.4173

How big is a standard Tru-Flo pipe drill?

pipe thread drilled hole sizes tap size cutting taps tru-flo ™ forming taps inch metric drill size decimal m30 x 3.50 26.50mm 1.0433 m30 x 2.00 28.00mm 1.1024