Prime Line Products Sp 9665 Extension Spring 5/16 in 2 Pack

Product Description

The PRIME LINE PRODUCTS SP 9665 is a closed single-loop extension spring constructed from durable spring steel with a nickel-plated finish. Designed to store and release tension in mechanical assemblies, this spring measures 5/16 inch outside diameter, 1/4 inch inside diameter, and 3 inches in length with a wire diameter of 0.028 inches. It carries a maximum safe load of 5.379 pounds and a maximum deflection of 2.85 inches. Each package contains two springs. The nickel-plated finish provides corrosion resistance, making these springs suitable for both indoor and outdoor applications. Licensed tradespeople and maintenance professionals will find this spring a reliable replacement or repair component in a wide range of light-duty mechanical systems.

These extension springs are well suited for residential and light commercial maintenance tasks. Typical applications include screen doors, cabinet hardware, garage-mounted equipment, small machinery, and general handyman repairs where a compact, corrosion-resistant extension spring is required. Their closed single-loop ends allow straightforward attachment to hooks, pins, and brackets. The two-pack quantity supports common repair scenarios where a matched pair or a spare is needed on the job.

Key Features

• Closed single-loop ends for secure attachment to hooks and pins
• Spring steel construction for reliable tension and load performance
• Nickel-plated finish resists corrosion for indoor and outdoor use
• Maximum safe load of 5.379 pounds with 2.85 inch maximum deflection
• Compact 3 inch length fits tight spaces in doors, hardware, and equipment
• Sold as a 2-pack for back-to-back repairs or matched installations

Compatibility

Designed as a general-purpose OEM-style replacement extension spring for light-duty mechanical, hardware, and maintenance applications requiring a 5/16 inch outside diameter closed-loop extension spring.

Installation Notes

Installation is typically performed by maintenance technicians or handyman professionals. Before servicing any spring-loaded assembly, relieve all tension from the existing spring and ensure the mechanism is secured against unintended movement. Use appropriate pliers or spring hooks to seat the closed loops onto mounting pins or hooks without overstretching the spring beyond its rated deflection. Never load the spring beyond the stated maximum safe load of 5.379 pounds.