Thread a screw through the tapped hole to pop these keys out of a keyway. When installed, they fill oval keyways completely, reducing stress on the key and shaft. Using them in a closed keyway keeps them from sliding along the shaft axis. The rounded ends make it easy to slide gears, hubs, and other components into place. To install, press them in to place. Use them for permanent or high-torque applications, or to replace a key in a worn keyway. Keys are made of steel.

Oversized keys create a tight fit. They conform to ANSI B17.1 Class 2 standards for dimensions and tolerances.

Undersized keys are good when you need a slightly looser fit or when you have an inconsistent keyway. Use them with parts you take apart frequently, such as for maintenance or prototyping. They meet DIN 6885 dimensional standards for undersized keys.

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

Tolerance

Lg. Tolerance

Rating Ht. Wd. Thread Size Specifications Met Each

1018-1045 Carbon Steel

3/16" × 3/16"

1/2" Oversized 0.000" to 0.001" 0.000" to 0.001" 4-40 ANSI B17.1 Class 2 90164A231 $6.85

3/4" Oversized 0.000" to 0.001" 0.000" to 0.001" 4-40 ANSI B17.1 Class 2 90164A314 6.92

1" Oversized 0.000" to 0.001" 0.000" to 0.001" 4-40 ANSI B17.1 Class 2 90164A315 6.98

1 1/2" Oversized 0.000" to 0.001" 0.000" to 0.001" 4-40 ANSI B17.1 Class 2 90164A407 7.13

1 3/4" Oversized 0.000" to 0.001" 0.000" to 0.001" 4-40 ANSI B17.1 Class 2 90164A481 7.20

2" Oversized 0.000" to 0.001" 0.000" to 0.001" 4-40 ANSI B17.1 Class 2 90164A569 7.27

1/4" × 1/4"

3/4" Oversized 0.000" to 0.001" 0.000" to 0.001" 6-32 ANSI B17.1 Class 2 90164A625 7.03

1" Oversized 0.000" to 0.001" 0.000" to 0.001" 6-32 ANSI B17.1 Class 2 90164A635 7.13

1 1/4" Oversized 0.000" to 0.001" 0.000" to 0.001" 6-32 ANSI B17.1 Class 2 90164A655 7.22

1 1/2" Oversized 0.000" to 0.001" 0.000" to 0.001" 6-32 ANSI B17.1 Class 2 90164A746 7.32

1 3/4" Oversized 0.000" to 0.001" 0.000" to 0.001" 6-32 ANSI B17.1 Class 2 90164A797 7.42

2" Oversized 0.000" to 0.001" 0.000" to 0.001" 6-32 ANSI B17.1 Class 2 90164A801 7.51

2 1/2" Oversized 0.000" to 0.001" 0.000" to 0.001" 6-32 ANSI B17.1 Class 2 90164A807 7.70

3/8" × 3/8"

1 1/2" Oversized 0.000" to 0.001" 0.000" to 0.001" 10-24 ANSI B17.1 Class 2 90164A862 7.82

2" Oversized 0.000" to 0.001" 0.000" to 0.001" 10-24 ANSI B17.1 Class 2 90164A871 8.20

1/2" × 1/2"

2" Oversized 0.000" to 0.001" 0.000" to 0.001" 1/4"-20 ANSI B17.1 Class 2 90164A901 9.27

5 mm × 5 mm

20mm Undersized -0.030mm to 0.000mm -0.030mm to 0.000mm M3 × 0.5 mm DIN 6885 90164A101 6.12

25mm Undersized -0.030mm to 0.000mm -0.030mm to 0.000mm M3 × 0.5 mm DIN 6885 90164A103 6.23

40mm Undersized -0.030mm to 0.000mm -0.030mm to 0.000mm M3 × 0.5 mm DIN 6885 90164A108 6.35

6 mm × 6 mm

20mm Undersized -0.030mm to 0.000mm -0.030mm to 0.000mm M3 × 0.5 mm DIN 6885 90164A112 6.53

25mm Undersized -0.030mm to 0.000mm -0.030mm to 0.000mm M3 × 0.5 mm DIN 6885 90164A114 6.59

30mm Undersized -0.030mm to 0.000mm -0.030mm to 0.000mm M3 × 0.5 mm DIN 6885 90164A115 6.64

32mm Undersized -0.030mm to 0.000mm -0.030mm to 0.000mm M3 × 0.5 mm DIN 6885 90164A116 6.68

50mm Undersized -0.030mm to 0.000mm -0.030mm to 0.000mm M3 × 0.5 mm DIN 6885 90164A123 6.95

7 mm × 8 mm

20mm Undersized -0.090mm to 0.000mm -0.036mm to 0.000mm M3 × 0.5 mm DIN 6885 90164A124 6.98

28mm Undersized -0.090mm to 0.000mm -0.036mm to 0.000mm M3 × 0.5 mm DIN 6885 90164A127 7.11

30mm Undersized -0.090mm to 0.000mm -0.036mm to 0.000mm M3 × 0.5 mm DIN 6885 90164A128 7.15

32mm Undersized -0.090mm to 0.000mm -0.036mm to 0.000mm M3 × 0.5 mm DIN 6885 90164A129 7.18

36mm Undersized -0.090mm to 0.000mm -0.036mm to 0.000mm M3 × 0.5 mm DIN 6885 90164A131 7.25

40mm Undersized -0.090mm to 0.000mm -0.036mm to 0.000mm M3 × 0.5 mm DIN 6885 90164A132 7.42

45mm Undersized -0.090mm to 0.000mm -0.036mm to 0.000mm M3 × 0.5 mm DIN 6885 90164A133 7.42

50mm Undersized -0.090mm to 0.000mm -0.036mm to 0.000mm M3 × 0.5 mm DIN 6885 90164A135 7.50

8 mm × 10 mm

20mm Undersized -0.036mm to 0.000mm -0.036mm to 0.000mm M3 × 0.5 mm DIN 6885 90164A137 7.44

30mm Undersized -0.036mm to 0.000mm -0.036mm to 0.000mm M3 × 0.5 mm DIN 6885 90164A142 7.70

36mm Undersized -0.036mm to 0.000mm -0.036mm to 0.000mm M3 × 0.5 mm DIN 6885 90164A144 7.84

40mm Undersized -0.036mm to 0.000mm -0.036mm to 0.000mm M3 × 0.5 mm DIN 6885 90164A146 7.95

50mm Undersized -0.036mm to 0.000mm -0.036mm to 0.000mm M3 × 0.5 mm DIN 6885 90164A149 8.19

56mm Undersized -0.036mm to 0.000mm -0.036mm to 0.000mm M3 × 0.5 mm DIN 6885 90164A151 8.42

8 mm × 12 mm

25mm Undersized -0.036mm to 0.000mm -0.043mm to 0.000mm M4 × 0.7 mm DIN 6885 90164A152 8.06

40mm Undersized -0.036mm to 0.000mm -0.043mm to 0.000mm M4 × 0.7 mm DIN 6885 90164A155 8.52

50mm Undersized -0.036mm to 0.000mm -0.043mm to 0.000mm M4 × 0.7 mm DIN 6885 90164A157 8.82

56mm Undersized -0.036mm to 0.000mm -0.043mm to 0.000mm M4 × 0.7 mm DIN 6885 90164A158 9.12

9 mm × 14 mm

30mm Undersized -0.090mm to 0.000mm -0.043mm to 0.000mm M5 × 0.8 mm DIN 6885 90164A159 9.57

36mm Undersized -0.090mm to 0.000mm -0.043mm to 0.000mm M5 × 0.8 mm DIN 6885 90164A162 9.84

50mm Undersized -0.090mm to 0.000mm -0.043mm to 0.000mm M5 × 0.8 mm DIN 6885 90164A165 10.39