Product Description: Heavy-Duty Greaseable Spring Bolt Kit with Locknut Comprehensive Kit Dimensions: This kit includes 14 high-quality spring bolts. Each bolt has an outer diameter of 9/16 inches, a length of 3 inches, and a thread size of 7/16in‑20, making them suitable for a variety of trailer suspension applications. Essential for Trailer Suspension: These spring bolts are designed to keep trailer suspensions well-lubricated, facilitating the installation of double eye or slipper style axle springs to hanger brackets or equalizers, ensuring smooth and reliable operation. Secure Knurled Design: The knurled shoulder design effectively prevents the bolt from spinning within the hanger bracket, providing a stable and firm installation. This feature enhances reliability and safety in your suspension system. Easy Maintenance and Long-Lasting: Featuring a greaseable design, these spring bolts offer ease of servicing and extended service life. Their durable construction means they don’t need to be changed frequently, saving you time and effort. Rugged Construction: Made from high-strength carbon steel and zinc-plated for rust resistance, these bolts boast exceptional durability. They are designed to withstand harsh conditions without bending or deforming, ensuring long-term performance. Upgrade your trailer's suspension system with this Heavy-Duty Greaseable Spring Bolt Kit. With its robust construction, secure installation features, and easy maintenance, this kit is the ideal solution for enhancing the reliability and longevity of your trailer’s suspension.