Drill Bit Guides | McMaster-Carr

	System of Measurement System of Measurement

Inch

Metric

	For Drill Bit Size For Drill Bit Size

	Material Material

Steel

Plastic

High-Speed Steel

	Length Length

	Width Width

	Height Height

	For Drill Bit Size Decimal Equivalent For Drill Bit Size Decimal Equivalent

	For Tap Size For Tap Size

	For Tap Type For Tap Type

Helical

Metric

Standard (UN)

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	For Use On For Use On

	For Screw Size For Screw Size

	Shank Type Shank Type


Quick-Change Hex	Round

	Size Size

	Decimal Size Equivalent Decimal Size Equivalent

	Point Style Point Style

Standard

Brad

	Shank Size Shank Size

1/4"

3/8"

6.4mm

	Point Angle Point Angle

30°

118°

	Maximum Drilling Depth Maximum Drilling Depth

	For Drill Bit Shaft Size For Drill Bit Shaft Size

3/16"

1/4"

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33 Products

Drill Bit Decimal Size Equivalents

About Drill Bits

Place on your workpiece to drill precise holes without building a fixture.

For Drill Bit Size	For Drill Bit Size Decimal Equivalent	Lg.	Wd.	Ht.	Material		Each
3/64", 1/16", 5/64", 3/32", 7/64", 1/8", No. 10, No. 21, No. 25, No. 29, No. 30, No. 33, No. 36, No. 37, No. 38, No. 40, No. 43, No. 45, No. 47, No. 50, No. 53	0.0469", 0.0595", 0.0625", 0.07", 0.0781", 0.0785", 0.082", 0.089", 0.0938", 0.098", 0.1015", 0.104", 0.1065", 0.1094", 0.113", 0.125", 0.128", 0.136", 0.1495", 0.159", 0.1935"	3 5/8"	5/8"	1/2"	Steel	0000000	000000
1/8", 9/64", 5/32", 11/64", 3/16", 13/64", 7/32", 15/64", 1/4", 17/64", 9/32", 19/64", 5/16", 21/64", 11/32", 23/64", 3/8"	0.125", 0.1406", 0.1563", 0.1719", 0.1875", 0.2031", 0.2188", 0.2344", 0.25", 0.2656", 0.2813", 0.2969", 0.3125", 0.3281", 0.3438", 0.3594", 0.375"	5 1/2"	3/4"	7/8"	Steel	0000000	00000
3/8", 25/64, 13/32", 27/64", 7/16", 29/64", 15/32", 1/2", 31/64"	0.375", 0.3906", 0.4063", 0.4219", 0.4375", 0.4531", 0.4688", 0.4844", 0.5"	5 1/4"	1"	7/8"	Steel	0000000	00000
3 mm, 3.3 mm, 3.5 mm, 4 mm, 4.2 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, 6.5 mm, 6.8 mm, 7 mm, 7.5 mm, 8 mm, 8.5 mm, 9 mm, 9.5 mm	0.1181", 0.1299", 0.1378", 0.1575", 0.1654", 0.1772", 0.1968", 0.2165", 0.2362", 0.2559", 0.2677", 0.2756", 0.2953", 0.315", 0.3346", 0.3543", 0.374"	5 1/2"	3/4"	7/8"	Steel	0000000	00000
10 mm, 10.5 mm, 11 mm, 11.5 mm, 12 mm, 12.5 mm, 13 mm, 13.5 mm, 14 mm	0.3937", 0.4134", 0.4331", 0.4528", 0.4724", 0.4921", 0.5118", 0.5315", 0.5512"	5 1/4"	1"	1 5/8"	Steel	0000000	00000

Clamp-On Drill Guides

Drill precise holes without building a fixture. Clamp the jig onto your material and lift and turn the turret to select the hole size you need. Use the graduations to set the jig to the centerline of your workpiece.

For Drill Bit Size	For Drill Bit Size Decimal Equivalent	Max. Opening Wd.	Lg.	Wd.	Ht.	Material		Each
3/16", 1/4", 5/16", 3/8", 7/16", 1/2"	0.1875", 0.25", 0.3125", 0.375", 0.4375", 0.5"	4"	7 1/8"	3 1/2"	2 1/8"	Steel and Nylon Plastic	0000000	000000

Tap Guides

Place on your workpiece to ensure straight, accurate threading without building a fixture.

For Tap Size	For Tap Type	Lg.	Wd.	Ht.	Material		Each
0-80, 1-72, 2-56, 2-64, 3-48, 3-56, 4-36, 4-40, 4-48, 5-40, 5-44, 6-32, 6-36, 6-40, 8-40, 8-36, 8-32, 10-24, 10-32, 1/64, 1/4"-20, 1/4"-28, 5/16"-18, 5/16"-24, 3/8"-16, 3/8"-24, 7/16"-14, 7/16"-20, 1/2"-13, 1/2"-20, 5/8"-11, 5/8"-18	Standard (UN)	4 5/8"	1"	7/8"	Steel	0000000	000000
6-32, 8-32, 10-24, 1/4"-20, 5/16"-18, 3/8"-16, 7/16"-14, 1/2"-13, 12-24, 9/16"-12	Helical	4 3/4"	1 1/8"	7/8"	Steel	0000000	00000
8-36, 10-32, 1/4"-28, 5/16"-24, 3/8"-24, 7/16"-20, 1/2"-20, 5/8"-18, 9/16"-18	Helical	5"	1 1/8"	7/8"	Steel	0000000	00000
1.6 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 5 mm, 6 mm, 8 mm, 10 mm, 12 mm, 14 mm, 16 mm	Metric	4 5/8"	1"	7/8"	Steel	0000000	00000

Hex-Shank Drill Bits with Guide for Countersunk Holes

The built-in guide has a beveled tip that fits into countersunk holes in hardware, such as hinges and latches, to center the bit. Guides are spring loaded; drilling pressure compresses the guide body and extends the drill bit into the workpiece. Insert directly into power screwdrivers, impact drivers, and other tools that accept a 1/4" hex shank. Also known as Vix bits.

For technical drawings and 3-D models, click on a part number.

Drill Bits with Guide
					Shank							Replacement Drill Bits
For Screw Size	Size	Decimal Size Equivalent	Overall Lg.	Max. Drilling Dp.	Type	Size	Guide Material	Point Style	For Use On		Each		Each
Inch
Uncoated High-Speed Steel
No. 2, No. 3, No. 4	5/64"	0.0781"	3 7/8"	0.62"	Quick-Change Hex	1/4"	Steel	Standard	Steel, Aluminum, Brass, Bronze, Plastic, Wood	0000000	000000	0000000	00000
No. 5, No. 6	7/64"	0.1094"	3 7/8"	0.62"	Quick-Change Hex	1/4"	Steel	Standard	Steel, Aluminum, Brass, Bronze, Plastic, Wood	0000000	00000	0000000	0000
No. 8, No. 9, No. 10	9/64"	0.1406"	3 7/8"	0.62"	Quick-Change Hex	1/4"	Steel	Standard	Steel, Aluminum, Brass, Bronze, Plastic, Wood	0000000	00000	0000000	0000
No. 12	11/64"	0.1719"	4 1/2"	0.62"	Quick-Change Hex	1/4"	Steel	Standard	Steel, Aluminum, Brass, Bronze, Plastic, Wood	0000000	00000	0000000	0000
No. 14	13/64"	0.2031"	4 1/2"	0.62"	Quick-Change Hex	1/4"	Steel	Standard	Steel, Aluminum, Brass, Bronze, Plastic, Wood	0000000	00000	0000000	0000
Metric
Uncoated High-Speed Steel
5 mm	5 mm	0.1968"	98mm	12.1mm	Quick-Change Hex	6.4mm	Steel	Brad	Steel, Aluminum, Brass, Bronze, Plastic, Wood	0000000	00000	0000000	0000

Round-Shank Drill Bits with Guide for Countersunk Holes

For technical drawings and 3-D models, click on a part number.

Drill Bits with Guide
					Shank							Replacement Drill Bits
For Screw Size	Size	Decimal Size Equivalent	Overall Lg.	Max. Drilling Dp.	Type	Size	Guide Material	Point Style	For Use On		Each		Each
Inch
Uncoated High-Speed Steel
No. 2, No. 3, No. 4	5/64"	0.0781"	3"	0.72"	Round	1/4"	Steel	Standard	Steel, Iron, Aluminum, Brass, Bronze, Plastic, Wood	00000000	000000	00000000	00000
No. 5, No. 6	7/64"	0.1094"	3 3/8"	1"	Round	1/4"	Steel	Standard	Steel, Iron, Aluminum, Brass, Bronze, Plastic, Wood	00000000	00000	00000000	0000
No. 8, No. 9, No. 10	9/64"	0.1406"	3 1/2"	0.94"	Round	1/4"	Steel	Standard	Steel, Iron, Aluminum, Brass, Bronze, Plastic, Wood	00000000	00000	00000000	0000
No. 12	11/64"	0.1719"	15/16"	1.19"	Round	3/8"	Steel	Standard	Steel, Iron, Aluminum, Brass, Bronze, Plastic, Wood	00000000	00000	00000000	0000
No. 14	13/64"	0.2031"	15/16"	1.19"	Round	3/8"	Steel	Standard	Steel, Iron, Aluminum, Brass, Bronze, Plastic, Wood	00000000	00000	00000000	0000

Hand Guides for Flexible-Shaft Drill Bits

Use this guide to position flexible-shaft drill bits.

	For Drill Bit
Material	Shank Type	Shaft Size	Lg.		Each
Steel	Round	3/16", 1/4"	10"	000000	000000