Prime Line Products Sp 9624 Extension Spring 4 Inch 2 Pack

Product Description

The PRIME LINE PRODUCTS SP 9624 is a heavy-duty extension spring designed for trampoline and general mechanical applications where a reliable, corrosion-resistant spring is required. Constructed from 0.125-gauge, heat-tempered spring steel wire with a bright nickel plating, this spring delivers consistent tension performance with a maximum safe load of 61.7 pounds and a maximum deflection of 0.73 inches. The nickel finish provides corrosion resistance suitable for both indoor and outdoor use. Each pack contains two springs, making it a practical quantity for side-by-side replacements or multi-unit service calls.

This spring is suited for trampoline mat attachment systems and similar extension-load applications in residential settings. With a 4-inch overall length, 13/64-inch outside diameter, and 37/64-inch inside diameter, it fits standard trampoline frame hook configurations. The heat-tempered steel construction maintains load characteristics over repeated cycle use, which is a key requirement in bounce-load environments. Installation or replacement is typically handled by the equipment owner or a general maintenance technician.

Key Features

• Heat-tempered spring steel wire maintains load performance through repeated extension cycles
• Bright nickel plating resists corrosion for indoor and outdoor use
• Maximum safe load of 61.7 pounds with 0.73-inch maximum deflection
• 4-inch length with 13/64-inch outside diameter fits standard trampoline hook configurations
• Sold as a 2-pack for efficient replacement of adjacent or worn spring pairs

Compatibility

Designed as an OEM-style replacement extension spring for trampolines and general mechanical assemblies requiring a 4-inch, 13/64-inch outside diameter extension spring.

Installation Notes

Extension spring replacement on trampolines should be performed with the mat detached and frame stable on level ground. A spring-pulling tool is strongly recommended to avoid hand injury during hook engagement. Inspect all surrounding springs and hook attachment points for wear or deformation before reinstalling the mat. Replace springs in matched pairs when possible to maintain even load distribution across the frame.