

Manufacturer pricing rules prevent us from advertising our discount — no account or email required to see it.
Secure Payments
Easy Returns
Expert Advice
Fast Shipping
The PRIME LINE PRODUCTS SP 9618 is a single loop closed extension spring designed for general-purpose repair and maintenance applications across residential, commercial, and light industrial settings. Constructed from spring steel with a nickel-plated finish for corrosion resistance, this spring measures 5/8 inch in outside diameter and 3-1/4 inches in length, with a deflection length of 2.01 inches. The closed single loop ends provide secure attachment points in standard hook or pin mounting configurations. This SKU ships as a pack of three springs, making it a practical choice for technicians and maintenance professionals who need reliable spares on hand.
These extension springs suit a wide range of repair scenarios including HVAC equipment panels, garage door accessories, appliance linkages, office equipment, and vehicle components. Their compact size and standard single loop closed design make them straightforward replacements in applications where the original spring has fatigued or broken. Maintenance technicians, handymen, and facility service professionals commonly stock these for fast field repairs rather than waiting on specialty hardware.
Designed as a general-purpose OEM-style replacement extension spring suitable for household, office, vehicle, and garage equipment applications requiring a 5/8 x 3-1/4 inch single loop closed spring.
Extension springs store tensile energy and should be installed and removed with appropriate hand tools and eye protection. Always release tension from the assembly before replacing a spring. Verify that the replacement spring outside diameter, length, and loop style match the original before installation. Installation is typically performed by general maintenance technicians without specialized trade licensing, though HVAC or garage door applications may require adherence to applicable local codes.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
Add install kit to cart
—
Thanks for subscribing!
This email has been registered!