What are number sizes on drill bits?

Number drill bit gauge sizes range from size 80 (the smallest) to size 1 (the largest) followed by letter gauge size A (the smallest) to size Z (the largest). Although the ASME B94. 11M twist drill standard, for example, lists sizes as small as size 97, sizes smaller than 80 are rarely encountered in practice.

What is the decimal size of a drill?


3/64″ .0469
1.20mm .0472
1.25mm .0492
1.30mm .0512

What size is a number 3 drill?


To Tap This Size Screw Or Bolt: Use This Drill Bit: (Closest Fractional:)
1/4-28 NF #3 7/32″
1/4-32 NEF 7/32″ 7/32″
1/4-40 NS #1
7mm-1.00mm 6.1mm 15/64″

What’s the decimal equivalent of a number 7 drill?

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

What size is a 0.2 drill bit?

Standard metric drill bit sizes

Drill size Diameter (in)
0.1 mm 0.0039
0.2 mm 0.0079
0.3 mm 0.0118
0.4 mm 0.0158

What size is a #45 drill bit?

Drill Bit Size Chart

Size Decimal Equivalent Decimal Equivalent
.44 mm 0.0173 0.1476
.45 mm 0.0177 0.1495
77 0.018 0.1496
.46 mm 0.0181 0.152

What size is #40 drill bit?

Drill Bit Size Chart

Size Decimal Equivalent Size
79 0.0145 28
.38 mm 0.015 9/64″
1/64″ 0.0156 3.60 mm
.40 mm 0.0157 27

What drill bit is 7mm?

Metric Tap and Drill Bit Size Table

Tap Metric Drill US Drill
6mm x 1.0 5.2mm
7mm x 1.0 6.1mm 15/64″
8mm x 1.25 6.9mm 17/64″
8mm x 1.0 7.1mm

What size is a 7mm drill bit?

What size is a #33 drill bit?

Drill Bit Size Chart

Size Decimal Equivalent Size
91 0.0083 35
90 0.0087 2.80 mm
89 0.0091 34
88 0.0095 33

What size is a #60 drill bit?

Downloadable versions:

Drill size Diameter (in) Diameter (mm)
#62 0.0380 0.9652
#61 0.0390 0.9906
1 mm 0.0394 1.0000
#60 0.0400 1.0160

What are the standard drill sizes?

What are the standard drill sizes? Range 1 (R1) is shortest in length, more common for sizing production tubing or casing, and ranges from 18 to 22 ft. Range 2 (R2) is considered the standard length for drill pipe and ranges from 27 to 31 ft. Range 3 (R3) is common in casing and also deployed in deep water drilling applications.

What size is a standard drill bit?

This final drill chart covers the standard bit sizes from 43/64 to 1 27/64. More About Drill Bit Sets and Sizing Some other helpful information to help you in your knowledge of drill bit sizes: Fractional Sizing Fractional sizing uses whole, half (1/2), quarter (1/4), eighth (1/8), sixteenths (1/16) and sixty-fourths (1/64).

What size is a number 8 drill bit?

Thus, drill bit #8 is on the larger side of your standard drill set. Here we will give you drill bit #8 in decimal inches, drill bit #8 in fractional inches, and drill bit #8 in decimal millimeters (mm). The purpose of this page is to give you an alternate drill bit (approximate equivalent) to drill bit gauge size Number 8 (#8).

What are drill bits sizes?

Installer bits are designed for installing wiring.

  • Self-centering drill bit ensures that the drill hole is accurately centered each time the drill is applied.
  • Drill saw bits are used for cutting irregular holes in metal or wood.
  • Pocket hole bits,when used with the proper jig,let you drill angled holes for screws.