B&B 94306 vs 94310 RV Access Hatches: Open or Solid Back

On an RV service compartment, the shape behind the hatch matters as much as the door. B&B Molders 94306 is an open-back multi-purpose access hatch, while 94310 has a flat solid back. Both have polar-white faces and the same exterior size, but they provide different access and mounting depth.

Same cutout, different back

How to choose

94306: access through the open rear

This keyed hatch provides a direct opening through the wall. The manufacturer specifies a 1⅛-inch collar and an original factory number of 301-040-00032. Confirm what is behind the wall and whether an open hatch is appropriate for the existing installation.

94310: enclosed flat rear

Use this style only where the original installation calls for a closed-back panel. The 2-inch collar needs more inward clearance than 94306. B&B lists OEM number 301-040-00116 for the blank-cylinder configuration and 301-040-00038 for its 751-key version.

Door and hatch product photographs

94306 — Open-back white access hatch

Keyed open-back hatch with a 1-1/8-inch mounting collar.

View 94306 product

94310 — Solid-back white access hatch

Keyed hatch with a flat solid back and 2-inch collar depth.

View 94310 product

94184 — Polar-white hatch door only

Door-only replacement for the specific compatible B&B hatch assemblies.

View 94184 product

Replacement door: 94184

The manufacturer's reference identifies 94184 as the white, door-only component for these hatch families. It does not replace the frame, collar or rear housing. Check that the original hatch matches the relevant factory design before fitting a replacement door.

Installation checks

1. Measure the wall opening and confirm the exterior flange covers the original mounting area.
2. Identify whether the rear of the old hatch is open or flat and solid.
3. Measure the available cavity depth for the specified collar.
4. Inspect the original hinge and keyed latch configuration before reusing or replacing the door.

Factory reference

The B&B Molders official parts catalog (PDF) shows the matching hatch or water-inlet assemblies and factory replacement part numbers on printed pages 43 and 46. The PDF may open in a separate viewer on mobile.

These hatches are not the same as the dedicated RV power-cord hatch assemblies, despite some similar outer dimensions.