When a round RV shore-power cable hatch cracks or will not stay shut, measure the opening in the wall and the visible outer flange separately. B&B Molders offers a standard-sized face, a larger deluxe face and versions with or without a rear back panel. The cord pass-through is intended for compatible 30- and 50-amp RV cables; it is not an electrical receptacle or an amperage converter.

Compare the round hatch versions

Manufacturer number Face diameter Wall cutout Configuration
94328 4⅝ in 3½ in Standard polar-white round hatch
94329 5⅛ in 3½ in Deluxe polar white, with back
94330 5⅛ in 3½ in Deluxe black, with back
94331 5⅛ in 3½ in Deluxe polar white, without back
94332 5⅛ in 3½ in Deluxe black, without back
Round hatch measurements — simplified face/cutout reference
3½-inch cutout

Exterior trim: 5⅛ inches on the deluxe models.

Wall opening: 3½ inches in diameter.

Rear depth: 2⅜-inch collar; also check whether the original has a back.

Identification diagram, not a scaled installation drawing.

Identify the important pieces

Part of the hatch What to compare
Outer flange / face The visible round trim must cover the existing cutout and old fastener area.
Main access door and hinge The deluxe design has a reinforced hinge; check swing clearance.
Smaller cord pass-through This opening lets a compatible power cord exit while the main door remains closed.
Collar and rear housing Check the 2⅜-inch rear collar clearance and whether the original hatch has a back or is open-backed.

Deluxe hatches available at UsedRVParts

94329 — Deluxe round hatch — polar white

B&B Molders 94329 Deluxe round hatch — polar white replacement part product photograph

5⅛-inch outer face with 3½-inch cutout and a covered-back arrangement.

View 94329 product

94330 — Deluxe round hatch — black

B&B Molders 94330 Deluxe round hatch — black replacement part product photograph

Black deluxe hatch with the same 3½-inch opening as 94329.

View 94330 product

Before ordering

  1. Measure the actual circular wall opening. All models in this comparison specify a 3½-inch opening.
  2. Check the existing outside trim diameter and how it overlaps the wall.
  3. Inspect the original rear configuration. A hatch without a back is not equivalent to a closed-back assembly.
  4. Match the finish, mounting clearance, cord pass-through and hinge direction.
  5. Follow the RV manufacturer's instructions for fastening and weather-sealing the exterior wall opening.

Manufacturer illustrations

Compare the original manufacturer drawings and part numbers in the B&B Molders round electrical cable hatch catalog (printed page 34).

If your opening is rectangular rather than circular, see the separate small and medium rectangular cord-hatch guide.

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