Sea-Dog Hatch Spring 9 Inch Stainless Steel, Part 321660-1, with Internal Safety Cable

The Sea-Dog Hatch Spring (Part 321660-1) supports a boat hatch lid in the open position and holds it there against wind and vibration. It is formed from 304 stainless steel for corrosion resistance in the marine environment, and it includes an internal wire cable running through the coil that prevents the spring from being overextended during normal use. This internal cable is a key safety feature: it keeps the spring from stretching past its working range and failing when the hatch is opened and closed repeatedly.

The spring measures 9 inches at dimension A, with B and C dimensions of 1-1/16 inches each. It installs using four #10 RH fasteners or 3/16 inch pop rivets, though fasteners are not included and must be purchased separately. Sea-Dog notes this spring is not recommended for applications where the hatch will scoop wind while the boat is underway, since that condition can overextend the spring beyond its intended use even with the internal cable in place. It is a direct fit wherever a 9 inch hatch spring of this bolt pattern is needed, such as replacing a worn or broken factory spring on a deck or cabin hatch.

Specifications

• Brand: Sea-Dog
• Manufacturer Part Number: 321660-1
• Material: 304 Stainless Steel
• Product Type: Hatch Spring
• Length (A): 9 inches
• Width (B): 1-1/16 inches
• Depth (C): 1-1/16 inches
• Fastener: #10 RH and/or 3/16 inch Pop Rivet (not included)
• Internal Safety Cable: Yes
• Weight: 0.228 pounds
• UPC: 035514321730

Frequently Asked Questions

What size is the Sea-Dog Hatch Spring 321660-1? The spring measures 9 inches at dimension A, with B and C dimensions of 1-1/16 inches each, on part number 321660-1.

What is the 321660-1 hatch spring made of? It is made of formed 304 stainless steel, chosen for its resistance to corrosion in marine environments.

Does this hatch spring include an internal safety cable? Yes, the 321660-1 hatch spring has an internal wire cable running through the coil that prevents the spring from being overextended during normal use.

What fasteners are needed to install the Sea-Dog Hatch Spring? Installation uses four #10 RH fasteners or 3/16 inch pop rivets; neither the screws nor the rivets are included with the 321660-1 spring.

Are mounting fasteners included with part 321660-1? No, the #10 RH fasteners or 3/16 inch pop rivets used to mount this Sea-Dog hatch spring must be purchased separately.

Can this hatch spring be used on a hatch that stays open while underway? Sea-Dog does not recommend the 321660-1 spring for applications where the hatch will scoop wind while the boat is underway, since that can overextend the spring even with the internal cable in place.

What does the internal cable on the hatch spring actually do? On the 321660-1 hatch spring, the internal wire cable acts as a physical limiter inside the coil, stopping the spring from stretching past its normal working range and reducing the risk of spring failure.

How much does the Sea-Dog Hatch Spring 321660-1 weigh? This hatch spring weighs 0.228 pounds.

Is the 321660-1 hatch spring corrosion resistant? Yes, it is constructed of corrosion resistant formed 304 stainless steel, suitable for marine deck and cabin hatch use.

What is the UPC for the Sea-Dog Hatch Spring, part 321660-1? The UPC for this Sea-Dog hatch spring is 035514321730.