C-21
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Specifications
Part Data
- Housing or Shaft Shaft
- Axial or Radial Radial
- Shaft Diameter Ds 0.219 inches
- Ds mm 5.600 mm
- Groove Diameter Dg 0.191 - 0.195 - inches
- Groove Width W 0.029 - 0.023 - inches
- Groove Depth D 0.013 inches
- Free Diameter Df 0.182 - 0.190 - inches
- Thickness T *** 0.023 - 0.027 - inches
- Maximum Section S Max 0.041 - 0.047 - inches
- Outside Diameter G 0.275 inches
- Clearance Dia. Installed In Groove L2 0.290 inches
- Weight Per 1000 Pcs. 0.120 lbs.
- Edge Margin Y Min. 0.026 inches
- Hardness ST 67.500 - 72.000 - HR30N
- Hardness SS 63.000 - 69.500 - HR30N
- Hardness BC 77.000 - 82.000 - HR15N
- Interchange Waldes Truarc 5103 21
- Interchange IRR 2000 21
- Interchange Anderton N1800 0021
- Interchange Mil Or Aero MS16632C 21
- Interchange Din
Performance Data
- Thrust Ld. (lbs.) Ring Safety Factor Of 4 Pr 264 lbs.
- Thrust Load Groove Safety Factor Of 2 Pg 100 lbs.
- R.P.M. Limits Standard Material RPM 71,000.000
Tool Data
- Standard Applicator (Flat) A-310
- 45 Applicator A-314
- 90 Applicator A-319
- Offset Applicator A-317
- Heavy Duty Dispenser D-40
- Spring Rail Dispenser SD-40
Product SKUs
Product SKUs listed may not include all available options. If you don't see what you're looking for, or need help selecting the right part, please contact us.
| Item SKU | Style | Material | Finish | Quote |
|---|---|---|---|---|
| C-21BC | External/Shaft crescent | Beryllium Copper Alloy 25 | None/Self Finish | Quote |
| C-21BC MTM | External/Shaft crescent MS16632-5021 | Beryllium Copper Alloy 25 | Military None/Self Finish | Quote |
| C-21SS | External/Shaft crescent | PH 15-7 Stainless Steel | None/Self Finish | Quote |
| C-21SS MPS | External/Shaft crescent MS16632-4021 | PH 15-7 Stainless Steel | Military Passivation | Quote |
| C-21ST PD | External/Shaft crescent | Carbon Steel SAE 1070-1090 | Phosphate & Oil | Quote |
| C-21ST Z3X | External/Shaft crescent | Carbon Steel SAE 1070-1090 | Trivalent Zinc | Quote |
| C-21ST ZD | External/Shaft crescent | Carbon Steel SAE 1070-1090 | Zinc Dichromate | Quote |
| C-21ST ZF | External/Shaft crescent | Carbon Steel SAE 1070-1090 | Zinc Flash | Quote |
| C-21ST MCD | External/Shaft crescent MS16632-1021 | Carbon Steel SAE 1070-1090 | Military CAD Plating | Quote |
| C-21ST MPD | External/Shaft crescent MS16632-3021 | Carbon Steel SAE 1070-1090 | Military Phosphate and Oil | Quote |
| C-21ST MZD | External/Shaft crescent MS16632-2021 | Carbon Steel SAE 1070-1090 | Military Zinc Dichromate | Quote |
Materials and Finishes
Materials
- Carbon Steel (SAE 1060-1090)
- Stainless Steel (PH15-7 Mo, PH17-7)
- Beryllium Copper
- Special Material Grades
Finishes
***For plated rings, add .002" (.05 mm) to the listed maximum thickness.
- PA - Phosphate, Carbon Steel
- PD - Phosphate and Oil, Carbon Steel
- PAL - Phosphate with Sealer, Carbon Steel
- HPD - Heavy Phosphate and Oil, Carbon Steel
- ZF - Zinc Bright, Carbon Steel
- ZDL - Zinc Dichromate with Sealer, Carbon Steel
- HZDL - Heavy Zinc Dichromate with Sealer, Carbon Steel
- Z3X - Trivalent Chromate over Zinc, Carbon Steel
- ZFF - Zinc Flash, Carbon Steel
- CF - Copper Flash, Carbon Steel
- ZD - Zinc Dichromate, Carbon Steel
Documentation
Description
C retaining rings are radially assembled external circlips and are part of Rotor Clip’s radial retaining ring line. Named for their characteristic "C" shape, these crescent-style rings feature a shallow radial width. This design is effective for low clearance applications where radial installation is preferred.
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