S-91589A890 7/8"-9 x 4 1/2" SAE J429 Plow Bolts

Key Features & Benefits at a Glance

• Exceptional strength for demanding applications with Grade 8 classification and 150,000 psi tensile strength, ensuring reliable performance under high stress.
• Superior wear resistance due to Rockwell C33 hardness, extending service life in abrasive environments like agricultural and construction equipment.
• Secure anti-rotation design with the key locking neck, preventing bolt loosening from vibration and dynamic loads in heavy machinery.
• Easy installation and removal with coarse 7/8"-9 UNC threading and Class 2A fit, reducing assembly time and maintenance efforts.
• Flush mounting capability with the standard flat head and 60° countersink angle, providing a smooth surface to minimize obstruction and material buildup.
• Compliance with industry standards including SAE J429, ensuring consistent quality and interchangeability for professional use.
• Environmentally responsible manufacturing with RoHS 3 and REACH compliance, supporting sustainable procurement practices.

Professional Applications & Engineering Value

These Grade 8 plow bolts are engineered to address critical challenges in heavy-duty sectors such as agriculture, construction, and industrial machinery. The key locking neck design effectively counters rotational forces, a common failure point in vibrating equipment like snow plows and earth-moving attachments. Made from high-strength steel with a Rockwell C33 hardness, they resist deformation and wear in abrasive conditions, while the coarse UNC threads and Class 2A fit ensure quick, secure fastening even in dirty or high-vibration environments. This combination of durability and anti-loosening features minimizes downtime and maintenance costs, making them ideal for demanding applications where reliability is paramount.

Specification Summary & Compliance

This product features a 7/8"-9 UNC coarse thread with Class 2A tolerance for precise fit, a flat head with standard profile, and partial threading with a minimum thread length of 2 inches. It complies with SAE J429 specifications for mechanical properties and is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safety and sustainability in industrial use.