S-90043A031 3/8"-16 Square Nuts

Key Features & Benefits at a Glance

• Enhanced Grip and Stability: The square design provides superior resistance to rotation, preventing loosening under vibration in heavy machinery and construction applications.
• Robust and Long-Lasting: Made from durable steel, this nut offers excellent strength and wear resistance for demanding industrial environments.
• Quick and Easy Installation: The external square drive allows for fast assembly with common wrenches, reducing labor time and effort.
• Reliable Thread Engagement: The Class 2B coarse (UNC) thread fit ensures consistent, secure fastening and accommodates minor variations for easier assembly.
• Standardized Compatibility: The 3/8"-16 UNC thread size is a common industrial standard, ensuring broad interchangeability and easy sourcing.
• Confident Global Sourcing: Full compliance with RoHS 3 and REACH regulations guarantees the nut is free from hazardous substances, meeting international safety and environmental standards.
• Optimized for Strength: With a substantial 5/8" width and 21/64" height, the nut provides a larger bearing surface for increased load distribution and clamping force.

Professional Applications & Engineering Value

This heavy-duty 3/8"-16 UNC square nut is engineered to solve critical challenges in industrial and construction settings where vibration and high stress are common. The steel construction ensures it can withstand significant mechanical loads without deforming, while the external square drive design allows for high-torque installation, preventing slippage and ensuring a tight, secure fit. The coarse UNC thread is particularly valuable in applications where debris or corrosion might be present, as it is less prone to clogging compared to fine threads. This makes it an ideal component for structural frameworks, heavy machinery assembly, and agricultural equipment, providing reliable, long-term performance that reduces maintenance needs and downtime. Its compliance with major environmental directives further adds value for companies with strict supply chain and sustainability requirements.

Specification Summary & Compliance

This square nut adheres to precise manufacturing standards, featuring a 3/8"-16 UNC coarse thread with a Class 2B thread fit for consistent and reliable engagement. The dimensional accuracy includes a width of 5/8" and a height of 21/64". The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets the latest environmental and safety standards for hazardous substances.