S-91589A810 5/8"-11 x 4" SAE J429 Plow Bolts

Key Features & Benefits at a Glance

• Exceptional tensile strength of 150,000 PSI from Grade 8 steel ensures reliable performance under extreme loads, reducing the risk of bolt failure in demanding applications.
• Secure anti-rotation design with the key locking neck prevents the bolt from turning during operation, maintaining consistent assembly integrity in high-vibration environments.
• Superior durability with Rockwell C33 hardness provides excellent resistance to wear and deformation, extending service life in abrasive conditions.
• Optimized thread engagement through UNC coarse threading and Class 2A fit allows for easier installation and consistent clamping force in dirty or debris-filled settings.
• Versatile flat head profile with 60° countersink angle enables flush mounting, minimizing protrusion and preventing snagging in moving equipment parts.
• Comprehensive compliance with SAE J429, RoHS 3, and REACH ensures material safety and meets industry standards for quality and environmental responsibility.
• Partially threaded shank concentrates strength where needed and allows for precise clamping on specific sections without unnecessary thread engagement.

Professional Applications & Engineering Value

This Grade 8 plow bolt is engineered to address critical challenges in agricultural and heavy equipment applications, where high stress, vibration, and exposure to abrasive materials are common. The key locking neck design effectively counters rotational forces that can loosen standard bolts, ensuring stable connections in plow blades, tillage equipment, and construction machinery. Made from high-strength steel with a Rockwell C33 hardness, it withstands impact and wear, while the 5/8"-11 UNC coarse thread facilitates quick assembly even in field conditions with minimal cleaning. The flat head sits flush to prevent material buildup and reduce drag, making it ideal for snowplows, earth-moving attachments, and other implements requiring smooth surface contact and reliable fastening under dynamic loads.

Specification Summary & Compliance

This plow bolt features a 5/8"-11 UNC coarse thread with Class 2A thread fit for consistent dimensional accuracy and ease of installation. It is manufactured in compliance with SAE J429 specifications for Grade 8 fasteners, ensuring mechanical properties such as tensile strength and hardness are rigorously met. Additionally, the product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming adherence to environmental and safety regulations for restricted substances. The partial threading, right-hand direction, and standard flat head profile further align with industry norms for reliable performance in heavy-duty applications.