STANDARD KEYWAYS & SET SCREWS
All dimensions are in inches unless otherwise indicated.
“Inch” Standard Keyways and Set Screw
“Metric” Standard Keyways and Set Screw Shaft Diameter (mm) From Including Keyway (mm) Width Depth Key (mm) Width Depth
Shaft Diameter (in.) From To
Keyway (in.) Width Depth
Key (in.) Width Depth
Set Screw Diameter
5/16
7/16 9/16
3/32
3/64 1/16 3/32
3/32
3/32
8-32 1-24
6 8
8
2 3 4 5 6 8
1
2 3 4 5 6 8
2 3 4 5 6 7 8 8 9
1/2 5/8
1/8
1/8
1/8
10 12 17 22 30 38 44 50 58 65 75 85 95
1.4 1.8 2.3 2.8 3.3 3.3 3.3 3.8 4.3 4.4 4.9 5.4 5.4 6.4 7.4 8.4
7/8
3/16
3/16
3/16
1/4
10 12 17 22 30 38 44 50 58 65 75 85 95
15/16 1-5/16 1-7/16 1-13/16 2-5/16 2-13/16 3-5/16 3-13/16 4-9/16 5-9/16 6-9/16
1-1/4 1-3/8 1-3/4 2-1/4 2-3/4 3-1/4 3-3/4 4-1/2 5-1/2 6-1/2 7-1/2
1/4
1/8
1/4
1/4
5/16 5/16
5/16
5/32 3/16
5/16
5/16
3/8 1/2 5/8 3/4 7/8
3/8 1/2 5/8 3/4 7/8
3/8 1/2 5/8 3/4 7/8
3/8 1/2 5/8 3/4 3/4 3/4 3/4
1/4
10 12 14 16 18 20 22 25 28 32 36
10 12 14 16 18 20 22 25 28 32 36
5/16
3/8
7/16
10 11 12 14 14 16 18 20
1
1/2 5/8 3/4 7/8
1
1
1-1/4 1-1/2 1-3/4
1-1/4 1-1/4 1-1/2 1-1/2 1-3/4 1-1/2
1 1 1 1
7-9/16 8-15/16
2
1
2
1-1/2
110 130 150
9
10-15/16 2-1/2 1-1/4 2-1/2 1-3/4
110 130
Knurled Cup Point Set Screws
Inch Cup Point Set Screw
Metric Cup Point Set Screw
Nominal Size
Tightening Torque (In-Lbs.)
Nominal Size
Tightening Torque (Nm) (In-Lbs.)
0 1 2 3 4 5 6 8
1.1 2.1 2.1 6.0 6.0
1.6
0.1 0.2 0.6 1.0 2.1 4.7 7.7
0.89 1.77 5.31 8.85
2
2.5
3 4 5 6 8
18.59 41.60 68.15
11 11 23 40 94
17.8 35.0 55.0 125 250 425
158 310 487
10
10 12 16 20 24
1/4
5/16
183 317 502 750
1106 2213 3762
3/8
7/16
1/2 5/8 3/4 7/8
1460 2520 5720 8000
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