Spare Parts for Freeman Marine Square & Rectangular Deck Hatches (2400 Series)

Welcome to Bövik Marin AB – authorized European distributor of genuine replacement parts and maintenance hardware for Freeman Marine square and rectangular cast deck hatches. Freeman four-sided closures are purpose-engineered for machinery space access, cargo transfer, crane access, and certified emergency escape trunks where vessel deck framing and structural bulkheads require right-angled deck cutouts.

All square and rectangular models in Freeman's cast 2400 Series portfolio are manufactured exclusively with heavy-weather knife-edge sealing geometry featuring an integrated perimeter drainage gutter to resist continuous green-water seas on working decks. Here you will find factory-original replacement components for all nine dimensional formats — from compact 18x24 and 20x20 utilities to statutory escape standard 24x24 and expansive 3036 and 3636 closures. We maintain comprehensive stock of custom-molded Knife-Edge gaskets (for aluminum and steel coamings), balanced dog arms, 4-hole and 8-hole cam hubs, flush deck handles, inside emergency escape hardware, and universal center bushing overhaul kits.

The dimensional overview below outlines the primary square and rectangular model families supported in our catalog:

Rectangular Formats 18x24, 24x28 & 30x36

Clear openings from 457x610 to 762x914 mm. Engineered for machinery access and cargo holds. Featuring the 8-arm linkage on Model 3036.

Lift-out & hinged configurations

Square Manhole Hatches 20x20, 22x22 & 24x24

Clear openings from 508x508 to 610x610 mm. Featuring statutory escape standard Model 2424 with 14.375" dog arms.

Class-approved emergency escape

Heavy Machinery Closures 27x27, 30x30 & 36x36

Clear openings from 686x686 to 914x914 mm. Reinforced 16.50"–18.50" dog arms (316 stainless on Model 3030) and inside escape hardware.

Maximum deck cutout access

100% Knife-Edge Sealing All cast 2400 square and rectangular hatches utilize hollow D-profile gaskets mating against a machined knife-edge rim with gutter. Select gaskets for alu or steel coamings ↓

Technical Guide: Kinematics, Coaming Gaskets and Maintenance for Four-Sided Hatches

Square and rectangular deck hatches endure severe torsional racking and bending deflection as the vessel works in heavy seaways. To ensure positive watertight integrity, Freeman's four-sided cast 2400 Series closures are engineered exclusively with knife-edge sealing technology. When dogged in under a quarter-turn, clamping torque concentrates along a machined knife-edge ridge directly into the cover's hollow neoprene gasket, maintaining an impermeable seal regardless of hull flexing.

1. Gasket Guide: Aluminum vs. Steel Coamings

All gaskets for square and rectangular models are molded from marine-grade neoprene in a hollow D-profile, offering exceptional elasticity and compression set resistance. Because channel width and tolerances differ between coaming metals, selecting the correct replacement part is critical:

Aluminum Coamings (9813 Series): Factory-molded gaskets with precision-formed corner radii engineered for Freeman's cast and extruded aluminum deck rings. Available in dedicated variations for lift-out covers and hinged assemblies.
Steel Coamings (9835 & 9885 Series): Specifically profiled gaskets with widened base dimensions designed for Freeman weld-in steel coamings to withstand heavy contact pressure and structural hull vibration.

2. Mechanical Geometry: 4-Hole vs. 8-Hole Cam Hubs

Standard 4-Arm Kinematics (Models 1824, 2428, 2020, 2222, 2424, 2727, 3030, and 3636): The vast majority of four-sided closures operate via Freeman's central 4-hole marine aluminum cam hub (Part no. 0011-2002). Dog arm lengths range from 11.375 inches (Model 2020) up to 17.50 inches (Model 3636) to distribute balanced clamping force across all four sides. Model 3030 is equipped with heavy-duty 316 stainless steel dog arms as standard (Part no. 0212-2013).
Heavy-Duty 8-Arm Kinematics (Model 3036): To span its expansive 762 x 914 mm clear opening, Model 3036 utilizes a massive 8-hole aluminum cam hub (Part no. 0011-2007) that actuates eight 15.00-inch dog arms simultaneously, ensuring uniform, deflection-free perimeter compression.

3. Universal Center Bushing Overhaul Kit (15"+ Architecture)

All nine square and rectangular models share Freeman's heavy-duty Universal Center Bushing Overhaul Kit (Part no. 0031-2204). If moisture weeps past the handle spindle or if turning resistance becomes excessive, renewing the bushing assembly complete with fresh dual O-rings and stainless roll pin restores immediate factory watertight integrity.

Need a Complete New Hatch Assembly or Replacement Deck Coaming?

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

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