S-91589A889 7/8"-9 x 4" SAE J429 Plow Bolts

Key Features & Benefits at a Glance

• Exceptional strength for heavy loads with Grade 8 classification and 150,000 psi tensile strength, ensuring reliability in the most demanding applications.
• Secure anti-rotation performance due to the key locking neck design, preventing loosening under high vibration and stress.
• Optimized for easy installation and removal featuring coarse 7/8"-9 UNC threading and Class 2A fit for quick assembly without sacrificing hold.
• Superior durability and wear resistance from Rockwell C33 hardness and steel construction, providing long service life in abrasive environments.
• Flush mounting capability with a standard flat head and 60° countersink angle for a smooth, snag-free surface finish.
• Trusted compliance and quality assurance meeting SAE J429 specifications and being RoHS 3 & REACH compliant for safe, regulated use.
• Versatile partial threading allowing for focused clamping force where needed, ideal for components requiring precise fastening.

Professional Applications & Engineering Value

This Grade 8 Plow Bolt is engineered to solve critical challenges in agricultural and industrial settings, where equipment faces extreme mechanical stress and environmental wear. The key locking neck is a standout feature, mechanically preventing rotation and slippage in high-vibration machinery like plows, earth-moving equipment, and heavy-duty conveyors. Manufactured from high-strength steel and heat-treated to a Rockwell C33 hardness, it resists deformation and fatigue, ensuring consistent performance. The 7/8"-9 UNC coarse thread and partial threading design allow for faster installation and concentrated clamping force, reducing assembly time while maintaining a secure grip. Its flat head with a standard profile ensures a flush fit, minimizing protrusion and risk of snagging. By integrating these elements, this bolt delivers reliable, long-term fastening solutions that reduce maintenance downtime and enhance operational safety in tough applications.

Specification Summary & Compliance

This plow bolt adheres to precise dimensional and performance criteria, including a Class 2A thread fit for consistent engagement and a 4" length with a 2" minimum thread length. It conforms to SAE J429 standards for mechanical properties and is fully RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring it meets stringent environmental and safety regulations. The bolt's construction follows recognized industrial specifications, providing assurance of quality and reliability for professional use.