Mil. Spec. External Retaining Rings
These rings meet military specification MS16624. 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.
1060-1090 spring steel rings are an economical choice with good strength. The cadmium-plated finish adds some corrosion resistance.
15-7 PH stainless steel rings are high strength with good corrosion resistance. Rings are passivated for added protection against corrosion.
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.
For Groove | Ring | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| For OD | Dia. | Wd. | ID | Thick. | Min. Hardness | Thrust Load Capacity, lbs. | Magnetic Properties | Specifications Met | Pkg. Qty. | Pkg. | |
Cadmium-Plated 1060-1090 Spring Steel | |||||||||||
| 1/4" | 0.23" | 0.03" | 0.225" | 0.025" | Rockwell C48 | 590 | Magnetic | MS16624 | 25 | 000000000 | 00000 |
| 5/16" | 0.29" | 0.03" | 0.281" | 0.025" | Rockwell C48 | 750 | Magnetic | MS16624 | 25 | 000000000 | 0000 |
| 3/8" | 0.352" | 0.03" | 0.338" | 0.025" | Rockwell C48 | 880 | Magnetic | MS16624 | 25 | 000000000 | 0000 |
| 7/16" | 0.412" | 0.03" | 0.395" | 0.025" | Rockwell C48 | 1,030 | Magnetic | MS16624 | 25 | 000000000 | 0000 |
| 1/2" | 0.468" | 0.04" | 0.461" | 0.035" | Rockwell C48 | 1,670 | Magnetic | MS16624 | 25 | 000000000 | 0000 |
| 9/16" | 0.53" | 0.04" | 0.521" | 0.035" | Rockwell C48 | 1,870 | Magnetic | MS16624 | 25 | 000000000 | 0000 |
| 5/8" | 0.588" | 0.04" | 0.579" | 0.035" | Rockwell C48 | 2,090 | Magnetic | MS16624 | 25 | 000000000 | 0000 |
| 11/16" | 0.646" | 0.047" | 0.635" | 0.042" | Rockwell C48 | 3,450 | Magnetic | MS16624 | 25 | 000000000 | 00000 |
| 3/4" | 0.704" | 0.047" | 0.693" | 0.042" | Rockwell C48 | 3,750 | Magnetic | MS16624 | 25 | 000000000 | 00000 |
| 13/16" | 0.762" | 0.047" | 0.751" | 0.042" | Rockwell C48 | 4,060 | Magnetic | MS16624 | 10 | 000000000 | 0000 |
| 7/8" | 0.821" | 0.047" | 0.81" | 0.042" | Rockwell C48 | 4,360 | Magnetic | MS16624 | 10 | 000000000 | 0000 |
| 15/16" | 0.882" | 0.047" | 0.867" | 0.042" | Rockwell C48 | 4,720 | Magnetic | MS16624 | 10 | 000000000 | 0000 |
| 1" | 0.94" | 0.047" | 0.925" | 0.042" | Rockwell C48 | 5,020 | Magnetic | MS16624 | 10 | 000000000 | 0000 |
| 1 1/8" | 1.059" | 0.056" | 1.041" | 0.05" | Rockwell C48 | 6,690 | Magnetic | MS16624 | 1 | 000000000 | 0000 |
| 1 1/4" | 1.176" | 0.056" | 1.156" | 0.05" | Rockwell C48 | 7,460 | Magnetic | MS16624 | 1 | 000000000 | 0000 |
| 1 3/8" | 1.291" | 0.056" | 1.272" | 0.05" | Rockwell C48 | 8,220 | Magnetic | MS16624 | 1 | 000000000 | 0000 |
| 1 1/2" | 1.406" | 0.056" | 1.387" | 0.05" | Rockwell C48 | 8,930 | Magnetic | MS16624 | 1 | 000000000 | 0000 |
| 1 5/8" | 1.529" | 0.068" | 1.503" | 0.062" | Rockwell C46 | 12,000 | Magnetic | MS16624 | 1 | 000000000 | 0000 |
| 1 3/4" | 1.65" | 0.068" | 1.618" | 0.062" | Rockwell C46 | 12,900 | Magnetic | MS16624 | 1 | 000000000 | 0000 |
15-7 PH Stainless Steel  | |||||||||||
| 1/4" | 0.23" | 0.03" | 0.225" | 0.025" | Rockwell C44 | 590 | Magnetic | Fed. Spec. QQ-P-35, MS16624 | 10 | 000000000 | 00000 |
| 5/16" | 0.29" | 0.03" | 0.281" | 0.025" | Rockwell C44 | 750 | Magnetic | Fed. Spec. QQ-P-35, MS16624 | 10 | 000000000 | 00000 |
| 3/8" | 0.352" | 0.03" | 0.338" | 0.025" | Rockwell C44 | 880 | Magnetic | Fed. Spec. QQ-P-35, MS16624 | 10 | 000000000 | 00000 |
| 7/16" | 0.412" | 0.03" | 0.395" | 0.025" | Rockwell C44 | 1,030 | Magnetic | Fed. Spec. QQ-P-35, MS16624 | 5 | 000000000 | 0000 |
| 1/2" | 0.468" | 0.04" | 0.461" | 0.035" | Rockwell C44 | 1,670 | Magnetic | Fed. Spec. QQ-P-35, MS16624 | 5 | 000000000 | 0000 |
| 9/16" | 0.53" | 0.04" | 0.521" | 0.035" | Rockwell C44 | 1,870 | Magnetic | Fed. Spec. QQ-P-35, MS16624 | 5 | 000000000 | 0000 |
| 5/8" | 0.588" | 0.04" | 0.579" | 0.035" | Rockwell C44 | 2,090 | Magnetic | Fed. Spec. QQ-P-35, MS16624 | 5 | 000000000 | 0000 |
| 11/16" | 0.646" | 0.047" | 0.635" | 0.042" | Rockwell C44 | 3,450 | Magnetic | Fed. Spec. QQ-P-35, MS16624 | 5 | 000000000 | 0000 |
| 3/4" | 0.704" | 0.047" | 0.693" | 0.042" | Rockwell C44 | 3,750 | Magnetic | Fed. Spec. QQ-P-35, MS16624 | 5 | 000000000 | 00000 |
| 13/16" | 0.762" | 0.047" | 0.751" | 0.042" | Rockwell C44 | 4,060 | Magnetic | Fed. Spec. QQ-P-35, MS16624 | 5 | 000000000 | 00000 |
| 7/8" | 0.821" | 0.047" | 0.81" | 0.042" | Rockwell C44 | 4,360 | Magnetic | Fed. Spec. QQ-P-35, MS16624 | 5 | 000000000 | 00000 |
| 15/16" | 0.882" | 0.047" | 0.867" | 0.042" | Rockwell C44 | 4,720 | Magnetic | Fed. Spec. QQ-P-35, MS16624 | 5 | 000000000 | 00000 |
| 1" | 0.94" | 0.047" | 0.925" | 0.042" | Rockwell C44 | 5,020 | Magnetic | Fed. Spec. QQ-P-35, MS16624 | 5 | 000000000 | 00000 |
| 1 1/8" | 1.059" | 0.056" | 1.041" | 0.05" | Rockwell C44 | 6,690 | Magnetic | Fed. Spec. QQ-P-35, MS16624 | 1 | 000000000 | 0000 |
| 1 1/4" | 1.176" | 0.056" | 1.156" | 0.05" | Rockwell C44 | 7,460 | Magnetic | Fed. Spec. QQ-P-35, MS16624 | 1 | 000000000 | 0000 |
| 1 3/8" | 1.291" | 0.056" | 1.272" | 0.05" | Rockwell C44 | 8,220 | Magnetic | Fed. Spec. QQ-P-35, MS16624 | 1 | 000000000 | 0000 |
| 1 1/2" | 1.406" | 0.056" | 1.387" | 0.05" | Rockwell C44 | 8,930 | Magnetic | Fed. Spec. QQ-P-35, MS16624 | 1 | 000000000 | 0000 |
| 1 5/8" | 1.529" | 0.068" | 1.503" | 0.062" | Rockwell C44 | 12,000 | Magnetic | Fed. Spec. QQ-P-35, MS16624 | 1 | 000000000 | 0000 |
| 1 3/4" | 1.65" | 0.068" | 1.618" | 0.062" | Rockwell C44 | 12,900 | Magnetic | Fed. Spec. QQ-P-35, MS16624 | 1 | 000000000 | 00000 |