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Inverted Internal Retaining Rings
For a smooth bore and better clearance than standard internal retaining rings, the lugs on these rings face outward. Squeeze them with retaining ring pliers (sold separately) to install in the groove inside a bore or housing. Ring OD is measured with the ring uninstalled. The black-phosphate finish is mildly corrosion resistant in dry environments.
DIN 472 rings meet international standards for retaining ring groove specifications.
Thrust load capacity, also known as PR, is based on using a shaft that is harder than the ring.
For technical drawings and 3-D models, click on a part number.
Inch
For Groove | Ring | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| For ID | Dia. | Wd. | OD | Thick. | Min. Hardness | Thrust Load Capacity, lbs. | Magnetic Properties | Specifications Met | Pkg. Qty. | Pkg. | |
Black-Phosphate 1060-1090 Spring Steel | |||||||||||
| 5/8" | 0.665" | 0.029" | 0.675" | 0.025" | Rockwell C48 | 1,010 | Magnetic | ASME B18.27.4 | 50 | 000000000 | 000000 |
| 3/4" | 0.796" | 0.039" | 0.808" | 0.035" | Rockwell C48 | 1,670 | Magnetic | ASME B18.27.4 | 50 | 000000000 | 00000 |
| 13/16" | 0.862" | 0.046" | 0.877" | 0.042" | Rockwell C47 | 2,630 | Magnetic | ASME B18.27.4 | 50 | 000000000 | 00000 |
| 7/8" | 0.931" | 0.046" | 0.944" | 0.042" | Rockwell C47 | 2,890 | Magnetic | ASME B18.27.4 | 50 | 000000000 | 00000 |
| 15/16" | 1" | 0.046" | 1.015" | 0.042" | Rockwell C47 | 3,140 | Magnetic | ASME B18.27.4 | 50 | 000000000 | 00000 |
| 1" | 1.066" | 0.046" | 1.081" | 0.042" | Rockwell C47 | 3,350 | Magnetic | ASME B18.27.4 | 50 | 000000000 | 00000 |
| 1 1/16" | 1.13" | 0.056" | 1.15" | 0.05" | Rockwell C47 | 4,210 | Magnetic | ASME B18.27.4 | 25 | 000000000 | 0000 |
| 1 1/8" | 1.197" | 0.056" | 1.217" | 0.05" | Rockwell C47 | 4,460 | Magnetic | ASME B18.27.4 | 50 | 000000000 | 00000 |
| 1 3/16" | 1.262" | 0.056" | 1.283" | 0.05" | Rockwell C47 | 4,720 | Magnetic | ASME B18.27.4 | 25 | 000000000 | 0000 |
| 1 1/4" | 1.33" | 0.056" | 1.351" | 0.05" | Rockwell C47 | 4,970 | Magnetic | ASME B18.27.4 | 25 | 000000000 | 0000 |
| 1 5/16" | 1.396" | 0.056" | 1.418" | 0.05" | Rockwell C47 | 5,220 | Magnetic | ASME B18.27.4 | 25 | 000000000 | 0000 |
| 1 3/8" | 1.461" | 0.056" | 1.486" | 0.05" | Rockwell C47 | 5,480 | Magnetic | ASME B18.27.4 | 25 | 000000000 | 00000 |
| 1 7/16" | 1.528" | 0.056" | 1.552" | 0.05" | Rockwell C47 | 5,730 | Magnetic | ASME B18.27.4 | 25 | 000000000 | 00000 |
| 1 1/2" | 1.594" | 0.056" | 1.622" | 0.05" | Rockwell C47 | 5,930 | Magnetic | ASME B18.27.4 | 25 | 000000000 | 00000 |
| 1 9/16" | 1.658" | 0.068" | 1.688" | 0.062" | Rockwell C47 | 7,710 | Magnetic | ASME B18.27.4 | 10 | 000000000 | 0000 |
| 1 5/8" | 1.725" | 0.068" | 1.756" | 0.062" | Rockwell C47 | 8,010 | Magnetic | ASME B18.27.4 | 10 | 000000000 | 0000 |
| 1 11/16" | 1.792" | 0.068" | 1.823" | 0.062" | Rockwell C47 | 8,370 | Magnetic | ASME B18.27.4 | 10 | 000000000 | 0000 |
| 1 3/4" | 1.858" | 0.068" | 1.891" | 0.062" | Rockwell C47 | 8,670 | Magnetic | ASME B18.27.4 | 10 | 000000000 | 0000 |
| 1 7/8" | 1.989" | 0.068" | 2.025" | 0.062" | Rockwell C47 | 9,280 | Magnetic | ASME B18.27.4 | 10 | 000000000 | 0000 |
| 2" | 2.122" | 0.068" | 2.16" | 0.062" | Rockwell C47 | 9,890 | Magnetic | ASME B18.27.4 | 1 | 000000000 | 0000 |
| 2 1/2" | 2.648" | 0.086" | 2.7" | 0.078" | Rockwell C47 | 15,500 | Magnetic | ASME B18.27.4 | 1 | 000000000 | 0000 |
| 3" | 3.182" | 0.103" | 3.245" | 0.093" | Rockwell C47 | 22,200 | Magnetic | ASME B18.27.4 | 1 | 000000000 | 0000 |
| 3 1/2" | 3.71" | 0.12" | 3.78" | 0.109" | Rockwell C45 | 30,300 | Magnetic | ASME B18.27.4 | 1 | 000000000 | 0000 |
| 4" | 4.24" | 0.12" | 4.35" | 0.109" | Rockwell C45 | 34,700 | Magnetic | ASME B18.27.4 | 1 | 000000000 | 0000 |
Metric
For Groove | Ring | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| For ID, mm | Dia., mm | Wd., mm | OD, mm | Thick., mm | Min. Hardness | Thrust Load Capacity, lbs. | Magnetic Properties | Specifications Met | Pkg. Qty. | Pkg. | |
Black-Phosphate 1060-1090 Spring Steel | |||||||||||
| 12 | 12.6 | 0.7 | 13.1 | 0.6 | Rockwell C47 | 400 | Magnetic | DIN 472 | 50 | 000000000 | 000000 |
| 13 | 13.6 | 0.7 | 14.5 | 0.6 | Rockwell C47 | 400 | Magnetic | DIN 472 | 50 | 000000000 | 00000 |
| 15 | 15.7 | 0.9 | 16.1 | 0.8 | Rockwell C47 | 740 | Magnetic | DIN 472 | 50 | 000000000 | 00000 |
| 16 | 16.8 | 1.1 | 17.3 | 1 | Rockwell C47 | 1,160 | Magnetic | DIN 472 | 50 | 000000000 | 00000 |
| 17 | 17.8 | 1.1 | 18.3 | 1 | Rockwell C47 | 1,300 | Magnetic | DIN 472 | 50 | 000000000 | 00000 |
| 18 | 19 | 1.1 | 19.5 | 1 | Rockwell C47 | 1,410 | Magnetic | DIN 472 | 25 | 000000000 | 0000 |
| 19 | 20 | 1.1 | 20.5 | 1 | Rockwell C47 | 1,480 | Magnetic | DIN 472 | 25 | 000000000 | 0000 |
| 20 | 21 | 1.1 | 21.5 | 1 | Rockwell C47 | 1,570 | Magnetic | DIN 472 | 25 | 000000000 | 0000 |
| 21 | 22 | 1.1 | 22.5 | 1 | Rockwell C47 | 1,660 | Magnetic | DIN 472 | 25 | 000000000 | 0000 |
| 22 | 23 | 1.1 | 23.5 | 1 | Rockwell C47 | 1,680 | Magnetic | DIN 472 | 25 | 000000000 | 0000 |
| 24 | 25.2 | 1.3 | 25.9 | 1.2 | Rockwell C47 | 3,250 | Magnetic | DIN 472 | 25 | 000000000 | 0000 |
| 25 | 26.2 | 1.3 | 26.9 | 1.2 | Rockwell C47 | 3,320 | Magnetic | DIN 472 | 25 | 000000000 | 0000 |
| 26 | 27.2 | 1.3 | 27.9 | 1.2 | Rockwell C47 | 3,430 | Magnetic | DIN 472 | 25 | 000000000 | 00000 |
| 27 | 28.4 | 1.3 | 29.1 | 1.2 | Rockwell C47 | 3,370 | Magnetic | DIN 472 | 25 | 000000000 | 00000 |
| 28 | 29.4 | 1.3 | 30.1 | 1.2 | Rockwell C47 | 3,430 | Magnetic | DIN 472 | 25 | 000000000 | 00000 |
| 30 | 31.4 | 1.3 | 32.1 | 1.2 | Rockwell C47 | 3,340 | Magnetic | DIN 472 | 25 | 000000000 | 00000 |
| 32 | 33.7 | 1.3 | 34.4 | 1.2 | Rockwell C47 | 3,160 | Magnetic | DIN 472 | 10 | 000000000 | 0000 |
| 33 | 34.7 | 1.3 | 35.5 | 1.2 | Rockwell C47 | 3,100 | Magnetic | DIN 472 | 10 | 000000000 | 0000 |
| 34 | 35.7 | 1.6 | 36.5 | 1.5 | Rockwell C47 | 5,390 | Magnetic | DIN 472 | 10 | 000000000 | 0000 |
| 35 | 37 | 1.6 | 37.8 | 1.5 | Rockwell C47 | 5,930 | Magnetic | DIN 472 | 10 | 000000000 | 0000 |
| 36 | 38 | 1.6 | 38.8 | 1.5 | Rockwell C47 | 6,180 | Magnetic | DIN 472 | 10 | 000000000 | 0000 |
| 38 | 40 | 1.6 | 40.8 | 1.5 | Rockwell C47 | 6,290 | Magnetic | DIN 472 | 10 | 000000000 | 0000 |
| 40 | 42.5 | 1.85 | 43.5 | 1.75 | Rockwell C47 | 10,220 | Magnetic | DIN 472 | 10 | 000000000 | 00000 |
| 42 | 44.5 | 1.85 | 45.5 | 1.75 | Rockwell C47 | 10,220 | Magnetic | DIN 472 | 10 | 000000000 | 00000 |
| 45 | 47.5 | 1.85 | 48.5 | 1.75 | Rockwell C47 | 9,890 | Magnetic | DIN 472 | 10 | 000000000 | 00000 |
| 48 | 50.5 | 1.85 | 51.5 | 1.75 | Rockwell C47 | 10,790 | Magnetic | DIN 472 | 10 | 000000000 | 00000 |
| 50 | 53 | 2.15 | 54.2 | 2 | Rockwell C44 | 15,510 | Magnetic | DIN 472 | 1 | 000000000 | 0000 |
| 52 | 55 | 2.15 | 56.2 | 2 | Rockwell C44 | 14,940 | Magnetic | DIN 472 | 10 | 000000000 | 00000 |
| 58 | 61 | 2.15 | 62.2 | 2 | Rockwell C44 | 14,380 | Magnetic | DIN 472 | 1 | 000000000 | 0000 |
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.
For technical drawings and 3-D models, click on a part number.
Inch
For Groove | Ring | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| For OD | Dia. | Wd. | ID | Thick. | Min. Hardness | Thrust Load Capacity, lbs. | Magnetic Properties | Specifications Met | Pkg. Qty. | Pkg. | |
Black-Phosphate 1060-1090 Spring Steel | |||||||||||
| 1/2" | 0.468" | 0.039" | 0.461" | 0.035" | Rockwell C47 | 1,110 | Magnetic | ASME B18.27.4 | 50 | 000000000 | 00000 |
| 5/8" | 0.588" | 0.039" | 0.579" | 0.035" | Rockwell C47 | 1,420 | Magnetic | ASME B18.27.4 | 50 | 000000000 | 0000 |
| 3/4" | 0.704" | 0.046" | 0.693" | 0.042" | Rockwell C47 | 2,530 | Magnetic | ASME B18.27.4 | 50 | 000000000 | 00000 |
| 7/8" | 0.821" | 0.046" | 0.81" | 0.042" | Rockwell C47 | 2,890 | Magnetic | ASME B18.27.4 | 50 | 000000000 | 00000 |
| 1" | 0.94" | 0.046" | 0.925" | 0.042" | Rockwell C47 | 3,350 | Magnetic | ASME B18.27.4 | 50 | 000000000 | 00000 |
| 1 1/16" | 0.998" | 0.056" | 0.982" | 0.05" | Rockwell C47 | 4,210 | Magnetic | ASME B18.27.4 | 25 | 000000000 | 0000 |
| 1 1/8" | 1.059" | 0.056" | 1.041" | 0.05" | Rockwell C47 | 4,460 | Magnetic | ASME B18.27.4 | 25 | 000000000 | 00000 |
| 1 3/16" | 1.118" | 0.056" | 1.098" | 0.05" | Rockwell C47 | 4,720 | Magnetic | ASME B18.27.4 | 25 | 000000000 | 00000 |
| 1 1/4" | 1.176" | 0.056" | 1.156" | 0.05" | Rockwell C47 | 4,970 | Magnetic | ASME B18.27.4 | 25 | 000000000 | 00000 |
| 1 5/16" | 1.232" | 0.056" | 1.214" | 0.05" | Rockwell C47 | 5,220 | Magnetic | ASME B18.27.4 | 25 | 000000000 | 00000 |
| 1 3/8" | 1.291" | 0.056" | 1.272" | 0.05" | Rockwell C47 | 5,480 | Magnetic | ASME B18.27.4 | 25 | 000000000 | 00000 |
| 1 7/16" | 1.35" | 0.056" | 1.333" | 0.05" | Rockwell C47 | 5,730 | Magnetic | ASME B18.27.4 | 25 | 000000000 | 00000 |
| 1 1/2" | 1.406" | 0.056" | 1.387" | 0.05" | Rockwell C47 | 5,930 | Magnetic | ASME B18.27.4 | 10 | 000000000 | 0000 |
| 1 9/16" | 1.468" | 0.068" | 1.446" | 0.062" | Rockwell C47 | 7,710 | Magnetic | ASME B18.27.4 | 10 | 000000000 | 0000 |
| 1 5/8" | 1.529" | 0.068" | 1.503" | 0.062" | Rockwell C47 | 8,010 | Magnetic | ASME B18.27.4 | 10 | 000000000 | 0000 |
| 1 25/32" | 1.669" | 0.068" | 1.637" | 0.062" | Rockwell C47 | 8,620 | Magnetic | ASME B18.27.4 | 10 | 000000000 | 0000 |
| 1 13/16" | 1.708" | 0.068" | 1.675" | 0.062" | Rockwell C47 | 8,980 | Magnetic | ASME B18.27.4 | 10 | 000000000 | 0000 |
| 1 31/32" | 1.857" | 0.068" | 1.819" | 0.062" | Rockwell C47 | 9,690 | Magnetic | ASME B18.27.4 | 10 | 000000000 | 0000 |
| 2" | 1.886" | 0.068" | 1.85" | 0.062" | Rockwell C47 | 9,890 | Magnetic | ASME B18.27.4 | 5 | 000000000 | 0000 |
| 2 1/2" | 2.36" | 0.086" | 2.313" | 0.078" | Rockwell C47 | 15,500 | Magnetic | ASME B18.27.4 | 1 | 000000000 | 0000 |
| 3 1/2" | 3.316" | 0.12" | 3.237" | 0.109" | Rockwell C45 | 30,300 | Magnetic | ASME B18.27.4 | 1 | 000000000 | 0000 |
| 4" | 3.792" | 0.12" | 3.7" | 0.109" | Rockwell C45 | 34,200 | Magnetic | ASME B18.27.4 | 1 | 000000000 | 0000 |
Metric
For Groove | Ring | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| For OD, mm | Dia., mm | Wd., mm | ID, mm | Thick., mm | Min. Hardness | Thrust Load Capacity, lbs. | Magnetic Properties | Specifications Met | Pkg. Qty. | Pkg. | |
Black-Phosphate 1060 Carbon Steel | |||||||||||
| 12 | 11.5 | 1.1 | 11 | 1 | Rockwell C47 | 1,010 | Magnetic | DIN 471 | 50 | 000000000 | 000000 |
| 13 | 12.4 | 1.1 | 11.9 | 1 | Rockwell C47 | 1,230 | Magnetic | DIN 471 | 50 | 000000000 | 00000 |
| 14 | 13.4 | 1.1 | 12.9 | 1 | Rockwell C47 | 1,340 | Magnetic | DIN 471 | 50 | 000000000 | 00000 |
| 15 | 14.3 | 1.1 | 13.8 | 1 | Rockwell C47 | 1,460 | Magnetic | DIN 471 | 50 | 000000000 | 00000 |
| 16 | 15.2 | 1.1 | 14.7 | 1 | Rockwell C47 | 1,570 | Magnetic | DIN 471 | 25 | 000000000 | 0000 |
| 17 | 16.2 | 1.1 | 15.7 | 1 | Rockwell C47 | 1,820 | Magnetic | DIN 471 | 25 | 000000000 | 0000 |
| 18 | 17 | 1.3 | 16.5 | 1.2 | Rockwell C47 | 3,320 | Magnetic | DIN 471 | 25 | 000000000 | 00000 |
| 20 | 19 | 1.3 | 18.5 | 1.2 | Rockwell C47 | 3,280 | Magnetic | DIN 471 | 25 | 000000000 | 00000 |
| 22 | 21 | 1.3 | 20.5 | 1.2 | Rockwell C47 | 3,190 | Magnetic | DIN 471 | 10 | 000000000 | 0000 |
| 23 | 22 | 1.3 | 21.5 | 1.2 | Rockwell C47 | 3,140 | Magnetic | DIN 471 | 10 | 000000000 | 0000 |
| 24 | 22.9 | 1.3 | 22.2 | 1.2 | Rockwell C47 | 3,140 | Magnetic | DIN 471 | 10 | 000000000 | 0000 |
| 25 | 23.9 | 1.3 | 23.2 | 1.2 | Rockwell C47 | 3,160 | Magnetic | DIN 471 | 10 | 000000000 | 0000 |
| 26 | 24.9 | 1.3 | 24.2 | 1.2 | Rockwell C47 | 3,160 | Magnetic | DIN 471 | 10 | 000000000 | 0000 |
| 30 | 28.6 | 1.6 | 27.9 | 1.5 | Rockwell C47 | 6,180 | Magnetic | DIN 471 | 10 | 000000000 | 00000 |
| 32 | 30.3 | 1.6 | 29.6 | 1.5 | Rockwell C47 | 6,060 | Magnetic | DIN 471 | 10 | 000000000 | 00000 |
| 35 | 33 | 1.6 | 32.2 | 1.5 | Rockwell C47 | 5,970 | Magnetic | DIN 471 | 10 | 000000000 | 00000 |
| 38 | 35.8 | 1.85 | 34.5 | 1.75 | Rockwell C47 | 9,440 | Magnetic | DIN 471 | 10 | 000000000 | 00000 |