| Base Number | 1-127 | Rockwell Q "MACK" Front Brake Shoe | |
| Brake Diameter | 16.5" | ![]() |
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| Brake Width | 5" | ||
| Manufacturer | Rockwell | ||
| FMSI Number | 4524 | ||
| BWP | M3199 | ||
| Euclid | E3823 | ||
| Nuturn | L2950 | ||
| Meritor | A3222J1440 | ![]() |
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| Rome | 4524ESTM | ||
| Eaton | |||
| Dana | |||
| Bendix | |||
| Web Number | 3222U1347 | Special Feature Notes: | Special Feature: |
| Table Number | 3222Z78 | Special Rockwell shoe designed for "Mack" applications. Look at the return spring retainer hole. Located higher on the web. |
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| Spring Kit | |||