Discover the Heavy‑Duty 5/8″ OD Extension Spring, a robust pair of coil springs engineered for reliable tension in a wide range of mechanical and DIY projects. Each spring measures 6.5 inches in free length, features a 0.054‑inch wire gauge, and is packaged conveniently in a polybag for easy handling.
Why choose these extension springs? Their precise engineering delivers consistent pull force up to 8.64 lb, while allowing a maximum deflection of 11.9 inches, making them ideal for applications that demand steady, repeatable motion. Whether you are upgrading equipment, building a prototype, or performing routine maintenance, these springs provide the strength and durability you need.
Key Features & Benefits:
- Standard 5/8″ outer diameter: Fits common mounting brackets and ensures compatibility with a variety of hardware.
- 6.5″ free length: Offers ample travel for smooth extension in mechanical linkages and motion systems.
- 0.054″ wire diameter: Balances flexibility and load capacity for reliable performance under stress.
- Maximum safe load of 8.64 lb: Provides a trustworthy load rating for automotive, industrial, and hobbyist uses.
- 11.9″ maximum deflection: Enables extended range of motion without compromising spring integrity.
Elevate your projects with confidence: These extension springs are manufactured to exact specifications, delivering consistent force and longevity. Their compact packaging and easy‑install design reduce downtime, while the high‑quality steel construction resists corrosion and wear. Choose this 2‑pack set for a cost‑effective solution that meets demanding performance standards and keeps your mechanisms moving smoothly.








