Sea-Dog Small Hatch Spring 321650-1, 8-5/8 Inch Stainless Steel Boat Hatch Lift Spring

The Sea-Dog Hatch Spring - Small (part number 321650-1) is a formed 304 stainless steel lift spring built to hold a boat hatch open and support it through repeated daily use. Its key safety feature is an internal wire running through the coil that prevents the spring from being overextended during normal operation, helping the spring keep its shape and holding power over time. The formed 304 stainless steel construction resists corrosion in a marine environment, making it suitable for long-term exposure to saltwater and weather.

This spring installs using four #6 RH fasteners or 1/8 inch pop rivets, which are not included and must be sourced separately. It is sized for smaller hatch openings, with an overall length of 8-5/8 inches. Sea-Dog notes that 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 range even with the internal wire safeguard. It ships as a single spring, with the manufacturer's standard pack quantity being 10 each for bulk ordering.

Specifications

• Brand: Sea-Dog
• Manufacturer Part Number: 321650-1
• Material: Formed 304 Stainless Steel
• Dimension A (Length): 8-5/8 inches
• Dimension B: 1-1/16 inches
• Dimension C: 3/4 inches
• Fastener Type: #6 RH or 1/8 inch Pop Rivet (fasteners not included)
• Internal Cable: Yes
• Weight: 0.226 pounds
• Standard Pack: 10 each
• UPC: 035514321037

Fitment

This is a universal boat hatch spring intended for small hatch openings; it is not restricted to a specific boat make or model.

Replaces (OEM)

No OEM cross-reference numbers are specified for this part number.

Frequently Asked Questions

What is the Sea-Dog 321650-1 hatch spring made of? The Sea-Dog 321650-1 Hatch Spring - Small is made of formed 304 stainless steel, chosen for its corrosion resistance in marine environments.

How long is this hatch spring? The 321650-1 hatch spring has an overall length of 8-5/8 inches, making it the small size in Sea-Dog's hatch spring lineup.

Does this spring include mounting fasteners? No, the four #6 RH fasteners or 1/8 inch pop rivets needed to install the 321650-1 hatch spring are not included and must be purchased separately.

What prevents the spring from overextending? An internal wire runs through the coil of the 321650-1 hatch spring, which prevents it from being overextended during normal use.

Can this hatch spring be used while the boat is underway with the hatch open? Sea-Dog does not recommend the 321650-1 hatch spring for applications where the hatch will scoop wind while the boat is underway, since that can overextend the spring.

How much does the 321650-1 hatch spring weigh? The Sea-Dog 321650-1 Hatch Spring - Small weighs 0.226 pounds.

What is the difference between the small and standard Sea-Dog hatch springs? The 321650-1 Small Hatch Spring measures 8-5/8 inches and uses #6 RH fasteners or 1/8 inch pop rivets, while Sea-Dog's larger 321660-1 Hatch Spring measures 9 inches and uses #10 RH fasteners or 3/16 inch pop rivets.

Is the 321650-1 hatch spring corrosion resistant? Yes, it is constructed of formed 304 stainless steel, which resists corrosion from saltwater and marine weather exposure.

What does the UPC 035514321037 correspond to? UPC 035514321037 identifies the Sea-Dog 321650-1 Hatch Spring - Small.

Is this hatch spring sold as a single unit or a pack? The Sea-Dog 321650-1 hatch spring is sold individually, though the manufacturer's standard pack quantity for bulk ordering is 10 each.

What are the width dimensions of the 321650-1 hatch spring? Beyond its 8-5/8 inch overall length, the 321650-1 hatch spring has additional listed dimensions of 1-1/16 inches and 3/4 inches at other measurement points on the spring.