Heng's 31121-C2
Compact white manual escape hatch with screen and interior garnish. Match the original roof opening and flange before ordering.
Identify Heng's Manual RV Escape Hatches by Size & MPN
If a motorhome or trailer has a damaged or missing exit vent, begin by identifying the complete escape hatch, not just the opening in the lid. Heng's manual hatches are sold in five nominal size groups, with different frames and matching lid numbers. The chart below helps identify the original assembly before any roof work is planned.
Recognize the complete hatch by size
The figures below are nominal model designations, not roof cutout dimensions. Lid references are shown to help identify an existing hatch; a complete assembly includes more than the lid.
| Complete hatch MPN | Nominal hatch size | Opening shape | Replacement lid reference |
|---|---|---|---|
| 31121-C2 | 13 × 20 in | Rectangular | 90007-C1 (lid reference) |
| 58621-C2 | 15 × 22 in | Rectangular | 90008-C1 |
| 48621-C2 | 17 × 24 in | Rectangular | 90088-C1 |
| 66621-C2 | 22 × 22 in | Square | 90129-C1 (lid reference) |
| 68631-C2 | 26 × 26 in | Square | 90014-C1 |
Size labels are not roof-cutting dimensions. The nominal 13 × 20, 15 × 22, 17 × 24, 22 × 22 and 26 × 26-inch designations do not equal the outside mounting-flange size or necessarily the required roof rough opening. Measure the installed frame and use the installation drawing for the exact hatch before cutting or replacing roof material.
How to inspect the part you have
- Find the original number: look on the hatch frame, garnish, old label or service records and compare the full MPN.
- Measure the existing opening: keep the roof rough opening, clear exit area and outside mounting flange as three separate measurements.
- Inspect the emergency release: the screen must open quickly and the lid must move unobstructed.
- Check the replacement scope: replace only a broken lid when the original frame and release work correctly; a cracked frame or failed latch may require broader repair.
- Check the hinge style: similar nominal dimensions across brands and generations do not prove interchangeable hardware.
Products by exact manufacturer number
Each card links to the exact UsedRVParts catalog product, where condition and availability should be checked. Viewing and pickup in Kelowna are by appointment.
Heng's 58621-C2
White manually opened hatch for the 15 × 22-inch family. The matching lid-only number is 90008-C1.
Heng's 48621-C2
Larger rectangular hatch with screen and garnish. The corresponding lid-only part is 90088-C1.
Heng's 66621-C2
Square-opening hatch. Do not substitute a Jensen 22 × 22-inch lid solely because the nominal size matches.
Heng's 68631-C2
Large white manually operated hatch. Its standard lid reference is 90014-C1, not the old-style lid.
Related escape hatch reference
Need a different part of the assembly? identify matching Heng's/Elixir and Jensen lid-only parts. Always confirm that the emergency opening and release operate freely after any repair.
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