| Holder | Fundamental | 3rd Overtone | 5th Overtone | 7th Overtone |
| HC-49/U | 2.5 - 30 MHz | 20 - 90 MHz | 50 - 150 MHz | 110 - 200 MHz |
| HC-49/T | 8 - 30 | 26 - 90 | 50 - 150 | 110 - 200 |
| HC-49/X | 12 - 30 | 30 - 90 | 50 - 150 | 110 - 200 |
| HC-49/U (SL) | 8 - 30 | 26 - 90 | 50 - 150 | 110 - 200 |
| HC-50/U | 2.5 - 30 | 20 - 90 | 50 - 150 | 110 - 200 |
FrequencyTolerance at 25
C: From 
50ppm to 5ppm.Frequency Tolerance over Temperature Range:
|
Temperature Range (C) |
Typical Deviation (ppm) | Tightest Deviation (ppm) |
| 0 to +50 |
5 |
3 |
| -10 to +60 |
10 |
5 |
| -30 to +60 |
20 |
10 |
| -55 to +105 |
50 |
30 |
Frequency Tolerance for In-Oven Crystals:
2ppm of oven temperature 5 C.
