Inch Size Socket Head Cap Screws with Black Oxide Plating

Socket Head Cap Screw  
Dimensions: ASME B18.3
Steel: ASTM A574
Less than 1/2"
Tensil Strength Minimum 180,000 psi
Proof Load 140,000 psi
Rockwell Hardness HRC 39-44
Greater than 1/2" 
Tensile Strength Minimum 170,000 psi
Proof Load 135,000 psi
Rockwell Hardness HRC 37-44

Socket head cap screws that are thermal black oxide alloy plated and available in inch sizes are specialized fasteners designed to offer both enhanced durability and resistance to corrosion. The thermal black oxide plating is a coating applied to the alloy steel to improve its surface properties, providing a sleek, black finish that also enhances the screw's resistance to wear, oxidation, and corrosion. This makes them particularly valuable in environments exposed to moisture, chemicals, or extreme temperatures.

The use of alloy steel in these screws ensures strength and longevity, making them suitable for heavy-duty applications. Common uses include aerospace, automotive, industrial machinery, and electronics, where high-strength fasteners are needed in harsh conditions. The inch size availability provides flexibility, ensuring compatibility with various equipment and mechanical systems designed with imperial measurements.

The benefits of these screws include superior corrosion resistance due to the black oxide coating, which helps protect against rust and environmental degradation. The thermal application of the black oxide ensures a more uniform coating, providing consistent performance over time. Additionally, the socket head design allows for greater torque application without the risk of damaging the screw, making them ideal for high-stress and precision fastening tasks. These screws combine durability, corrosion resistance, and high-performance fastening in one reliable product.