Heavy Hex Nut A563 Grade A Zinc

Overview: A563 Grade A Hex Nut

• Designed for strength and reliability, BoltCraft’s heavy hex nuts are manufactured to meet ASTM A563 specifications, specifically A563 Grade A. These carbon steel nuts are tempered and produced in compliance with both chemical and mechanical requirements.
• The zinc coating enhances corrosion resistance, making them ideal for general structural use, including indoor and outdoor applications. Furnishing nuts with the correct thread direction and threads per inch is essential for compatibility with externally threaded parts such as bolts or studs.

Applications & Advantages

• Ideal for structural, mechanical, and construction applications where a robust hex nut is required to ensure joint integrity. These heavy hex nuts meet specification allowances related to oversizing, flats, and thread direction, which are acceptable provided they align with ASTM standards.
• The zinc plating provides an added layer of corrosion resistance, making these nuts suitable for a wide range of environments. These nuts are compatible with nominal sizes commonly used in industrial applications, and their properties meet the standards for reliable load-bearing fastening.

Material & Specifications

• These nuts are made from carbon steel conforming to the ASTM A563 Grade A specification, with a max carbon content of 0.55%. The composition includes controlled levels of phosphorus and sulfur to ensure strength and ductility.
• These chemical and mechanical requirements make them suitable for use with lower-strength bolts, while also furnishing nuts that can work in applications where stronger grades are not necessary.

Hardness & Durability

• The nuts are designed to achieve a hardness level within the Rockwell B68 – C32 range, meeting key mechanical requirements for general structural fastening. This balance between strength and ductility ensures they can handle expected stress levels under demanding conditions.
• Their thicker and wider profile compared to standard hex nuts provides a greater length of thread engagement, enhancing resistance to dilation and extending durability for use with externally threaded parts like bolts and studs.

Proof Load & Finish: A563 Grade A Hex Nuts

• With a proof load suitable for low-carbon heavy hex bolt applications, these nuts are engineered to withstand significant stress. Their proof load stress capacity ensures secure joint assembly, even when exposed to vibration and heavy-duty loads.
• The zinc coating enhances corrosion resistance while supporting the longevity of fastening systems across various environments. All properties and performance standards adhere to ASTM and purchase order specifications for A563 grade nuts, ensuring consistency in stock quality and expected results in use.