The same pitch does not mean identical dimensions.
| Dimension | 428 | 428H |
|---|---|---|
| Pitch P / mm | 12.70 | 12.70 |
| Roller diameter Dr, max / mm | 8.51 | 8.51 |
| Inner width W, min / mm | 7.75 | 7.75 |
| Plate thickness T / mm | 1.50 | 1.80 |
| Pin length L, max / mm | 16.50 | 18.70 |
Source: Dongying drive-chain catalogue. This compares Dongying catalogue values; it does not establish the dimensions of every manufacturer’s 428H chain.
What else should the buyer confirm?
Check sprockets, side clearance, length, connecting link, vehicle requirements and order acceptance criteria. A heavy-duty suffix alone does not establish vehicle interchangeability.