Value Collection 3sscs95c408 Hex Socket Cap Screw 5/16-18

Product Description

The VALUE COLLECTION 3sscs95c408 is a partially threaded hex socket cap screw designed for fastening applications that require high corrosion resistance and reliable clamping force. Manufactured from 18-8 austenitic stainless steel (Austenitic Grade A2), this fastener measures 4-1/2 inches in length under the head and uses a 1/4 inch hex drive. The 5/16-18 UNC thread pattern conforms to ASME/ANSI B18.3 and ASTM F837 standards, making it a code-compliant choice for mechanical assemblies, equipment mounting, and general industrial fastening tasks. Installers working in corrosive or washdown environments benefit from the stainless steel construction.

This screw is suited for residential and commercial maintenance, machine assembly, and light structural fastening wherever a recessed hex drive is preferred over an external hex head. The partial threading allows the unthreaded shank to bear shear loads, which is common in close-tolerance mechanical joints. Typical users include maintenance technicians, millwrights, plumbers, and HVAC service professionals securing equipment panels, brackets, and support structures. The 1/4 inch hex drive is compatible with standard hex keys and hex bit drivers found in most trade toolkits.

Key Features

• 5/16-18 UNC thread size for broad compatibility with standard tapped holes
• 4-1/2 inch length under head accommodates deeper stack-ups and thicker assemblies
• Partially threaded shank handles shear loads in close-tolerance joints
• 18-8 austenitic stainless steel (Grade A2) provides corrosion resistance in wet or chemically active environments
• 1/4 inch hex socket drive allows use with standard hex keys and power bit drivers
• Meets ASME/ANSI B18.3 and ASTM F837 fastener standards

Compatibility

Designed as a standard replacement or maintenance fastener for any application requiring a 5/16-18 UNC partially threaded hex socket cap screw with a 4-1/2 inch length under head, conforming to ASME/ANSI B18.3 dimensional standards.

Installation Notes

Installation requires a 1/4 inch hex key or hex bit driver; confirm the mating tapped hole is clean and free of debris before driving the fastener. Power down or de-energize any equipment being serviced before accessing fastened assemblies. Avoid mixing stainless steel fasteners with dissimilar metals in environments prone to galvanic corrosion. Follow applicable codes and equipment manufacturer torque guidelines for the specific joint being assembled.