Drill Size Charts | McMaster-Carr

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15 Products

Reference Charts


Style A	Style B

Style A—Style A charts provide decimal equivalents of fractions, wire gauge drill sizes, letter drill sizes, and metric sizes.

Style B—Style B charts provide a pipe tap drill chart as well as decimal equivalents of tap drill sizes, fractions, wire gauge drill sizes, letter drill sizes, and metric sizes.

	System of Measurement	Ht.	Wd.	Mounting Location		Each
Decimal Equivalents and Drill Sizes



	A	Inch, Metric	6"	3 3/8"	—	0000000	00000


	A	Inch, Metric	13"	8 1/2"	Wall	0000000	0000
	B	Inch, Metric	6"	3 3/8"	—	0000000	0000
	B	Inch, Metric	13"	8 1/2"	Wall	0000000	0000

Tap and Drill Chart/Rulers

One side of this ruler lists tap and drill sizes. The other side has a decimal equivalent table and a 6" rule.

			Graduation
Lg.	Wd.	Graduations	Color	Location	Numeric Graduations	Material	Features		Each
7"	1 1/4"	1/64"	Black	Front	8/64"	Stainless Steel	Tap and Drill Sizes for UNF, UNC, Metric ISO, and American Standard Pipe Thread Sizes Decimal Equivalent Table for 1/64" to 63/64" Hanging Hole	0000000	00000

Drill Bit Size Gauges


For Inch	For Letter Size	For Metric	For Wire Gauge

Measure drill bit sizes with these gauges.

For Taps—Drills/taps gauges include a tap size conversion chart.

For System of Measurement	For Use With	For Drill Bit Size	Wd.	Ht.	Thk.	Material	Color	Mounting Hole Dia.	Each
Inch	Drills	1/16", 5/64", 3/32", 7/64", 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", 25/64", 13/32", 27/64", 7/16", 29/64", 15/32", 31/64", 1/2"	2 1/2"	6 1/2"	5/64"	Steel	Silver	1/8"	000000
Letter Size	Drills	A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z	2 1/2"	6 1/2"	5/64"	Steel	Silver	1/8"	00000
Metric	Drills	1.5 mm, 2.0 mm, 2.25 mm, 2.5 mm, 2.75 mm, 3.0 mm, 3.25 mm, 3.5 mm, 3.75 mm, 4.0 mm, 4.25 mm, 4.5 mm, 4.75 mm, 5.0 mm, 5.25 mm, 5.5 mm, 6.0 mm, 6.5 mm, 7.0 mm, 7.5 mm, 8.0 mm, 8.5 mm, 9.0 mm, 9.5 mm, 10.0 mm, 10.5 mm, 11.0 mm, 11.5 mm, 12.0 mm, 12.5 mm	2 1/2"	6 1/2"	5/64"	Steel	Silver	1/8"	00000
Wire Gauge	Drills	80 Ga., 79 Ga., 78 Ga., 77 Ga., 76 Ga., 75 Ga., 74 Ga., 73 Ga., 72 Ga., 71 Ga., 70 Ga., 69 Ga., 68 Ga., 67 Ga., 66 Ga., 65 Ga., 64 Ga., 63 Ga., 62 Ga., 61 Ga.	1"	3"	5/64"	Steel	Silver	1/8"	00000
Wire Gauge	Drills/Taps	60 Ga., 59 Ga., 58 Ga., 57 Ga., 56 Ga., 55 Ga., 54 Ga., 53 Ga., 52 Ga., 51 Ga., 50 Ga., 49 Ga., 48 Ga., 47 Ga., 46 Ga., 45 Ga., 44 Ga., 43 Ga., 42 Ga., 41 Ga., 40 Ga., 39 Ga., 38 Ga., 37 Ga., 36 Ga., 35 Ga., 34 Ga., 33 Ga., 32 Ga., 31 Ga., 30 Ga., 29 Ga., 28 Ga., 27 Ga., 26 Ga., 25 Ga., 24 Ga., 23 Ga., 22 Ga., 21 Ga., 20 Ga., 19 Ga., 18 Ga., 17 Ga., 16 Ga., 15 Ga., 14 Ga., 13 Ga., 12 Ga., 11 Ga., 10 Ga., 9 Ga., 8 Ga., 7 Ga., 6 Ga., 5 Ga., 4 Ga., 3 Ga., 2 Ga., 1 Ga.	2 1/2"	6 1/2"	5/64"	Steel	Silver	1/8"	00000

Screw Size Identifiers


Inch	Metric

Find thread size, screw size, diameter, or drill bit size.

	For Thread Size	For Screw Size	For Dia.	For Drill Bit Size	Wd.	Ht.	Thk.		Each
Inch







	Steel

	Screws, Bolts, Threaded Rods, Pins, Rivets, Drill Bits	UNC/UNF	External	1-64, 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, 8-32, 8-36, 8-40, 10-24, 10-32, 12-24, 12-28, 12-32, 1/4"-20, 1/4"-28, 1/4"-32, 5/16"-18, 5/16"-24, 5/16"-32	No. 1, No. 2, No. 3, No. 4, No. 5, No. 6, No. 8, No. 10, No. 12, 1/8", 5/32", 3/16", 7/32", 1/4", 9/32", 5/16"	0.073", 0.086", 3/32", 0.112", 1/8", 0.138", 5/32", 0.164", 3/16", 7/32", 1/4", 9/32", 5/16"	7/32", 1/4", 9/32", 5/16", 53 Ga., 51 Ga., 50 Ga., 48 Ga., 47 Ga., 45 Ga., 43 Ga., 42 Ga., 39 Ga., 38 Ga., 37 Ga., 36 Ga., 35 Ga., 33 Ga., 30 Ga., 29 Ga., 28 Ga., 25 Ga., 23 Ga., 21 Ga., 19 Ga., 16 Ga., 14 Ga., 13 Ga., 10 Ga., 8 Ga., 3 Ga., F, I	3"	5 1/8"	5/64"	000000000	000000


	Metric







					Steel

					Screws, Bolts, Threaded Rods, Drill Bits	Metric	External	M2 × 0.25 mm, M2 × 0.4 mm, M2.2 × 0.25 mm, M2.2 × 0.45 mm, M2.5 × 0.35 mm, M2.5 × 0.45 mm, M3 × 0.35 mm, M3 × 0.5 mm, M3.5 × 0.35 mm, M3.5 × 0.6 mm, M4 × 0.5 mm, M4 × 0.7 mm, M4.5 × 0.5 mm, M4.5 × 0.75 mm, M5 × 0.5 mm, M5 × 0.8 mm, M5.5 × 0.5 mm, M6 × 0.75 mm, M6 × 1 mm, M7 × 0.75 mm, M7 × 1 mm	M2, M2.2, M2.5, M3, M3.5, M4, M4.5, M5, M5.5, M6, M7	—	7/32", 52 Ga., 50 Ga., 48 Ga., 46 Ga., 45 Ga., 43 Ga., 39 Ga., 37 Ga., 32 Ga., 31 Ga., 30 Ga., 28 Ga., 25 Ga., 22 Ga., 21 Ga., 18 Ga., 16 Ga., 10 Ga., 8 Ga., 4 Ga., B, D, J	3"	5 3/8"	3/32"	000000000	00000

Drill Point Angle Gauges

Verify 118° drill point angles after sharpening. The ruler has a hook for alignment.

		Ruler
	For Use With	Lg.	Wd.	Front Graduation Marks (Numeric Increments)	Back Graduation Marks (Numeric Increments)	Lg.	Wd.	Thk.	Color	Graduation Color		Each
For Inch







				Steel

				118° Drills	6"	3/4"	1/64" (8/64"), 1/32" (4/32")	1/8" (1"), 1/16" (1")	6 1/4"	2 5/32"	3/64"	Silver	Black	0000000	0000000

All-in-One Identifiers

Find tube, pipe, fastener, wire, and drill bit sizes with one tool.

For Pipe Size	For Pipe Fitting Size	Wd.	Ht.		Each







Plastic

Screws, Bolts, Threaded Rods, Drill Bits, Nails, Nuts, Tube Fittings, Pipe, Pipe Fittings, Tubing, Wire	No. 2, No. 3, No. 4, No. 5, No. 6, No. 8, No. 10, No. 12, 1/4", 5/16", 3/8", 7/16", 1/2", M3, M4, M5, M6, M8, M10, M12	1/32", 3/64", 1/16", 5/64", 3/32", 7/64", 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", 25/64", 13/32", 27/64", 7/16", 29/64", 15/32", 31/64", 1/2", 65 Ga., 60 Ga., 55 Ga., 50 Ga., 45 Ga., 40 Ga., 35 Ga., 30 Ga., 25 Ga., 20 Ga., 15 Ga., 10 Ga., 5 Ga., A, F, K, P, U, Z	1/16, 1/8, 1/4, 3/8, 1/2, 3/4, 1, 1 1/4, 1 1/2, 2, 2 1/2, 3, 3 1/2, 4, 5, 6	1/16, 1/8, 1/4, 3/8, 1/2, 3/4, 1, 1 1/4, 1 1/2, 2	10 1/2"	3 1/2"	00000000	00000


Screws, Bolts, Threaded Rods, Drill Bits, Nails, Nuts, Tube Fittings, Pipe, Pipe Fittings, Tubing, Wire	No. 2, No. 3, No. 4, No. 5, No. 6, No. 8, No. 10, No. 12, 1/4", 5/16", 3/8", 7/16", 1/2", M3, M4, M5, M6, M8, M10, M12	1/16", 5/64", 3/32", 7/64", 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"	1/8, 1/4, 3/8, 1/2, 3/4, 1, 1 1/4, 1 1/2, 2	1/8, 1/4, 3/8, 1/2, 3/4, 1	8 11/16"	4 1/4"	00000000	0000