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3/8-24 High Speed Steel Tap Set

Selected Tap SetHSS Tap Set
Tap SetHSS Tap Set

Product Specification

Tap Type
Plug, Taper, Bottom
Bit Decimal
0.3750
Overall Length
2 15/16
Thread Length
1.2500
Material
High Speed Steel
Country of Origin
Domestic
Weight
0.231000
Size
3/8

Tap Drill Chart

Tap Size Drill Size Probable
% Thread
M3-0.5 40 70-79
5-40 38 65-72
5-44 37 63-71
M3.5-0.6 33 72-81
6-32 36 71-78
6-40 33 69-77
M4-0.7 3.25 mm 74-82
8-32 29 62-69
8-36 29 70-78
10-24 25 69-75
10-32 21 68-76
M5-0.8 4.2 mm 69-77
12-24 16 66-72
12-28 15 70-78
M6-1.0 10 76-84
1/4-20 7 70-75
1/4-28 3 72-80
5/16-18 F 72-77
5/16-24 I 67-75
M8-1.25 6.7 mm 74-80
3/8-16 5/16 72-77
3/8-24 Q 71-79
M10-1.50 8.4 mm 76-82
7/16-14 U 70-75
7/16-20 25/64 65-72
M12-1.75 13/32 69-74
1/2-13 27/64 73-78
1/2-20 29/64 65-72
Tap Size Drill Size Probable
% Thread
M14-2.0 15/32 76-81
9/16-12 31/64 68-72
9/16-18 33/64 58-65
5/8-11 17/32 75-79
5/8-18 37/64 58-65
M16-2.0 35/64 76-81
3/4-10 21/32 68-72
3/4-16 11/16 71-77
M20-2.5 11/16 74-78
7/8-9 49/64 72-76
7/8-14 13/16 62-67
M24-3.0 53/64 72-76
1-8 7/8 73-77
1-12 59/64 67-72
1-14 15/16 61-67
1-1/8-7 63/64 72-76
1-1/8-8 1 76
1-1/8-12 1-3/16 66-72
M30-3.5 1-3/64 75
1-1/4-7 1-7/64 76
1-1/4-8 1-1/8 76
1-1/4-12 1-11/64 72
1-3/8-6 1-7/32 72
1-3/8-12 1-19/64 72
M36-4.0 1-1/4 82
1-1/2-6 1-11/32 72
1-1/2-8 1-3/8 76
1-1/2-12 1-27/64 72
NPT Tap Size Taper Pipe
Drill Size		 Straight Pipe
Drill Size
1/8-27 R 11/32
1/4-18 7/16 7/16
3/8-18 37/64 37/64
1/2-14 45/64 23/32
3/4-14 59/64 59/64
1-11.5 1-5/32 1-5/32
1-1/4-11.5 1-31/64 1-1/2
1-1/2-11.5 1-47/64 1-3/4
2-11.5 2-7/32 2-7/32

Dimensional Specifications

Tap Size Thread Drill Size % of
Thread		 Overall
Length		 Length of
Thread		 Number
of Flutes
0 80 3/64 71-81 1 11/16 3/8 2
1 64 53 59-67 1 11/16 3/8 2
1 72 53 67-75 1 11/16 3/8 2
2 56 50 62-69 1 3/4 7/16 3
2 64 50 70-79 1 3/4 7/16 3
3 48 5/64 70-77 1 13/16 1/2 3
3 56 46 69-78 1 13/16 1/2 3
4 40 43 65-71 1 7/8 9/16 3
4 48 42 61-68 1 7/8 9/16 3
5 40 38 65-72 1 5/16 5/8 3
5 44 37 63-71 1 5/16 5/8 3
6 32 36 71-78 2 11/16 3
6 40 33 69-77 2 11/16 3
8 32 29 62-69 2 1/8 3/4 4
8 36 29 70-78 2 1/8 3/4 4
10 24 25 69-75 2 3/8 7/8 4
10 32 21 68-79 2 3/8 7/8 4
12 24 16 66-72 2 3/8 15/16 4
12 28 15 70-78 2 3/8 15/16 4
1/4 20 7 70-75 2 1/2 1 4
1/4 28 3 72-80 2 1/2 1 4
5/16 18 F 72-77 2 23/32 1 1/8 4
5/16 24 1 67-75 2 23/32 1 1/8 4
3/8 16 5/16 72-77 2 15/16 1 1/4 4
3/8 24 Q 71-79 2 15/16 1 1/4 4
7/16 14 U 70-75 3 5/32 1 7/16 4
7/16 20 25/64 65-72 3 5/32 1 7/16 4
1/2 13 27/64 73-78 3 3/8 1 21/32 4
1/2 20 29/64 65-72 3 3/8 1 21/32 4
9/16 12 31/64 68-72 3 19/32 1 21/32 4
9/16 18 33/64 58-65 3 19/32 1 21/32 4
5/8 11 17/32 75-79 3 13/16 1 13/16 4
5/8 18 37/64 58-65 3 13/16 1 13/16 4
3/4 10 21/32 68-72 4 1/4 2 4
3/4 16 11/16 71-77 4 1/4 2 4
7/8 9 49/64 72-76 4 11/16 2 7/32 4
7/8 14 13/16 62-67 4 11/16 2 7/32 4
1 8 7/8 73-77 5 1/8 2 1/2 4
1 12 59/64 67-75 5 1/8 2 1/2 4
1 14 15/16 61-67 5 1/8 2 1/2 4
1 1/8 7 63/64 72-76 5 7/16 2 9/16 4
1 1/8 12 1 3/16 66-72 5 7/16 2 9/16 4
1 1/4 7 1 7/64 76 5 3/4 2 9/16 4
1 1/4 12 1 11/64 72 5 3/4 2 9/16 6
1 3/8 6 1 7/32 72 6 1/16 3 4
1 3/8 12 1 19/64 72 6 1/16 3 6
1 1/2 6 1 11/32 72 6 3/8 3 4
1 1/2 12 1 27/64 72 6 3/8 3 6
  1. All dimensions are in inches.