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Freeman Compression seal gasket Model 30 (30" / 762 mm)
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Freeman Bushing assembly with stainless steel sleeve (pre-2011)
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Deck hatches & spare partsSpare Parts & MaintenanceSpare Parts – Round HatchesModel 18 (18" round)

Spare Parts for Freeman Marine Model 18 Round Deck Hatches (18" / 457 mm)

Welcome to Bövik Marin AB – authorized European distributor of genuine factory replacement parts for Freeman Marine Model 18 round cast deck hatches. Offering an 18-inch (457 mm) clear opening, Model 18 is one of the commercial marine industry's most versatile access closures, widely specified for personnel access, emergency escape trunks, and machinery spaces across Coast Guard cutters, patrol craft, lifeboat rescue vessels, and commercial workboats.

Model 18 is manufactured in both compression and knife-edge sealing formats (Models 18, 18-H, 18K, and 18-HK). Mechanically, the hatch operates via Freeman's 3-arm dogging geometry where a central 3-hole cam hub synchronizes three 8.75-inch aluminum dog arms at 120-degree intervals to deliver massive, uniform clamping force in under a quarter-turn. Below you will find all genuine mechanical components and gaskets required for routine maintenance and class surveys.

Model 18 Component Directory (Featured Items Below):

1. Sealing System & Gaskets • Compression Gasket (Part no. 9801-2006)
• Knife-Edge Gaskets (hollow profile):
  - Hinged / Aluminum ring (9812-2011)
  - Hinged / Steel ring (9810-2009)
  - Lift-out / Aluminum ring (9813-2020)
  - Lift-out / Steel ring (9835-2016)
2. Dogging Mechanism & Arms • Aluminum Dog Arm 8.75" (Part no. 0211-2005)
• 3-Hole Cam Hub (Part no. 0011-2001)
• Optional: 316 S/S stainless dog arms
3. Actuation & Drive Shaft • Flush Deck Handle 316 S/S
• Handle Spindle & Roll Pins (15"+ standard)
• Inside Escape Handle Assemblies
4. Center Bushing & Hardware • Universal Bushing Overhaul Kit (Part no. 0031-2204)
• Cam Buttons / Wear Pads (Part no. 0621-2004)
• Nylon Thrust Washers (Part no. 0413-2005)

Technical Guide: Service and Gasket Specification for Freeman Model 18

Because Model 18 is produced in both compression and knife-edge sealing configurations, selecting the correct replacement parts is essential. The coaming geometry dictates which elastomer profile seats into the cover groove:

1. Gasket Guide for Model 18 – Compression vs. Knife-Edge

  • Compression Hatches (Models 18 & 18-H): Utilize Freeman's solid continuous molded Compression Gasket (Part no. 9801-2006). The coaming features a smooth raised seating spigot without an outer collection trough. The same continuous ring fits both lift-out covers and hinged (-H) variants across aluminum and steel deck rings.
  • Knife-Edge Hatches (Models 18K & 18-HK): The coaming features a machined knife-edge rim flanked by a perimeter drainage gutter. The gasket is a hollow D-profile neoprene elastomer. Because channel tolerances vary between coaming metals, four specific factory options exist:
    • Hinged / Aluminum Ring: Part no. 9812-2011
    • Hinged / Steel Ring: Part no. 9810-2009
    • Lift-Out / Aluminum Ring: Part no. 9813-2020
    • Lift-Out / Steel Ring: Part no. 9835-2016

2. Dogging Kinematics: 3-Arm Geometry with 8.75" Dog Arms

Like Model 15, Model 18 operates with three dog arms spaced at 120-degree intervals. The Model 18 arm measures 8.75 inches in length (222 mm, Part no. 0211-2005) and is actuated by Freeman's central 3-hole marine aluminum cam hub (Part no. 0011-2001). Ensure during servicing that the nylon cam buttons (Part no. 0621-2004) are intact and that the hub tracks are lubricated with high-adhesion marine grease.

3. Center Bushing & Spindle Sealing

Moisture leaking beneath the flush deck handle indicates worn spindle O-rings. Model 18 utilizes Freeman's heavy-duty Universal Center Bushing Overhaul Kit (Part no. 0031-2204), containing a marine-grade sleeve bushing, dual O-rings, and stainless roll pin.

Need a Complete New Hatch Assembly or Replacement Deck Coaming?

If your coaming has suffered structural damage or you are engineering a new deck opening, explore complete hatch assemblies and genuine factory coamings:

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