Inverted External Retaining Rings

For a smooth profile and better clearance than standard external retaining rings, the lugs on these rings point inward. Open them with retaining ring pliers (sold separately), pass them over the end of a shaft, and release to spring into the groove. Ring ID is measured with the ring uninstalled. The black-phosphate finish is mildly corrosion resistant in dry environments.

Thrust load capacity, also known as PR, is based on using a shaft that is harder than the ring.

Metric rings meet DIN 471 specifications for retaining ring grooves.

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

Inch

For Groove

Ring

For ODDia.Wd.IDThick.Min. HardnessThrust Load

Capacity, lbs.Magnetic

PropertiesSpecifications MetPkg.

Qty. Pkg.

Black-Phosphate 1060-1090 Spring Steel

1/2"0.468"0.039"0.461"0.035"Rockwell C471,110MagneticASME B18.27.45090213A105$7.63

5/8"0.588"0.039"0.579"0.035"Rockwell C471,420MagneticASME B18.27.45090213A1068.96

3/4"0.704"0.046"0.693"0.042"Rockwell C472,530MagneticASME B18.27.45090213A10710.87

7/8"0.821"0.046"0.81"0.042"Rockwell C472,890MagneticASME B18.27.45090213A10812.48

1"0.94"0.046"0.925"0.042"Rockwell C473,350MagneticASME B18.27.45090213A10914.84

1 1/16"0.998"0.056"0.982"0.05"Rockwell C474,210MagneticASME B18.27.42590213A1119.13

1 1/8"1.059"0.056"1.041"0.05"Rockwell C474,460MagneticASME B18.27.42590213A1129.30

1 3/16"1.118"0.056"1.098"0.05"Rockwell C474,720MagneticASME B18.27.42590213A11310.31

1 1/4"1.176"0.056"1.156"0.05"Rockwell C474,970MagneticASME B18.27.42590213A11413.83

1 5/16"1.232"0.056"1.214"0.05"Rockwell C475,220MagneticASME B18.27.42590213A11514.84

1 3/8"1.291"0.056"1.272"0.05"Rockwell C475,480MagneticASME B18.27.42590213A11615.21

1 7/16"1.35"0.056"1.333"0.05"Rockwell C475,730MagneticASME B18.27.42590213A11715.21

1 1/2"1.406"0.056"1.387"0.05"Rockwell C475,930MagneticASME B18.27.41090213A1187.01

1 9/16"1.468"0.068"1.446"0.062"Rockwell C477,710MagneticASME B18.27.41090213A1197.63

1 5/8"1.529"0.068"1.503"0.062"Rockwell C478,010MagneticASME B18.27.41090213A1218.98

1 25/32"1.669"0.068"1.637"0.062"Rockwell C478,620MagneticASME B18.27.41090213A1227.69

1 13/16"1.708"0.068"1.675"0.062"Rockwell C478,980MagneticASME B18.27.41090213A1237.69

1 31/32"1.857"0.068"1.819"0.062"Rockwell C479,690MagneticASME B18.27.41090213A1247.69

2"1.886"0.068"1.85"0.062"Rockwell C479,890MagneticASME B18.27.4590213A1254.72

2 1/2"2.36"0.086"2.313"0.078"Rockwell C4715,500MagneticASME B18.27.4190213A1011.18

3 1/2"3.316"0.12"3.237"0.109"Rockwell C4530,300MagneticASME B18.27.4190213A1037.04

4"3.792"0.12"3.7"0.109"Rockwell C4534,200MagneticASME B18.27.4190213A1048.71

Metric

For Groove

Ring

For OD,

mmDia.,

mmWd.,

mmID,

mmThick.,

mmMin. HardnessThrust Load

Capacity, lbs.Magnetic

PropertiesSpecifications

MetPkg.

Qty. Pkg.

Black-Phosphate 1060 Carbon Steel

1211.51.1111Rockwell C471,010MagneticDIN 4715097213A101$12.77

1312.41.111.91Rockwell C471,230MagneticDIN 4715097213A10212.77

1413.41.112.91Rockwell C471,340MagneticDIN 4715097213A10312.77

1514.31.113.81Rockwell C471,460MagneticDIN 4715097213A10412.77

1615.21.114.71Rockwell C471,570MagneticDIN 4712597213A1056.96

1716.21.115.71Rockwell C471,820MagneticDIN 4712597213A1067.07

18171.316.51.2Rockwell C473,320MagneticDIN 4712597213A10710.29

20191.318.51.2Rockwell C473,280MagneticDIN 4712597213A10810.94

22211.320.51.2Rockwell C473,190MagneticDIN 4711097213A1095.97

23221.321.51.2Rockwell C473,140MagneticDIN 4711097213A1106.28

2422.91.322.21.2Rockwell C473,140MagneticDIN 4711097213A1116.41

2523.91.323.21.2Rockwell C473,160MagneticDIN 4711097213A1126.51

2624.91.324.21.2Rockwell C473,160MagneticDIN 4711097213A1136.66

3028.61.627.91.5Rockwell C476,180MagneticDIN 4711097213A11410.08

3230.31.629.61.5Rockwell C476,060MagneticDIN 4711097213A11511.18

35331.632.21.5Rockwell C475,970MagneticDIN 4711097213A11611.85

3835.81.8534.51.75Rockwell C479,440MagneticDIN 4711097213A11713.29

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 Mil. Spec. External Retaining RingsSelf-Locking External Retaining Rings 

Inverted External Retaining Rings