What size drill bit is used for a 4 40 tap?

Tap and Drill Size Chart

THREADSIZE	DRILL DIAMETER Coarse Thread	TAP DRILLSIZE
1-64	.0595	No. 53
2-56	.0700	No. 50
3-48	.0785	No. 47
4-40	.0890	No. 43

What size drill bit is a number 4?

Drill sizes to 1″ diameter

Drill sizes to 1″ diameter Legend Fractional Inch Letter Drill Millimeters Number Drill
Millimeters	Inches	Tap Drill/Pilot Drill Uses
2.1844mm	.086″
2.2606mm	.089″	#4-40 UNC
2.3749mm	.0935″	#4-48 UNF

What is the drill size for a 4mm tap?

Metric Tap and Drill Bit Size Table

Tap	Metric Drill	US Drill
4mm x 0.7	3.4mm	–
5mm x 0.8	4.3mm	–
6mm x 1.0	5.2mm	–
7mm x 1.0	6.1mm	15/64″

What size drill bit do you use for a 3/4 Tap?

US Tap and Drill Bit Size Table

Tap	Fractional Drill Bit	Letter Drill Bit
5/8″-18	37/64″	–
3/4″-10	21/32″	–
3/4″-16	11/16″	–
Drill sizes are for 75% depth of thread.

What size drill do you use for a 1/4-20 tap?

13/64″

To Tap This Size Screw Or Bolt:	Use This Drill Bit:	(Closest Fractional:)
1/4-20 NC	#7	13/64″
14-24 NS	#7	–
6mm-1.00mm	5.2mm	–
1/4-24 NS	#4	–

What drill bit is closest to 5 16?

To Tap This Size Screw Or Bolt:	Use This Drill Bit:	(Closest Fractional:)
8mm-1.00mm	7.1mm	–
5/16-32 NEF	9/32″	9/32″
9mm-1.25mm	7.9mm	–
3/8-16 NC	5/16″	5/16″

How many MM is a 1/4 drill bit?

Drill Bit Hole Diameters
Metric Size	Fractional Size
7 mm	.2756	1/4
8 mm	.3150	17/64
9 mm	.3543	9/32

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.