Value Collection 581173PR Hex Socket Cap Screw 5-40 Unc

Product Description

The VALUE COLLECTION 581173PR is a hex socket cap screw designed for precise, high-torque fastening in mechanical assemblies and structural applications. It features a 5-40 UNC thread size with 1 inch of length under the head and is partially threaded for controlled engagement. The drive is a 3/32 inch internal hex (Allen) socket, requiring a standard hex key for installation and removal. Constructed from alloy steel with a black oxide finish coating, this screw delivers solid mechanical strength and moderate corrosion resistance in indoor and light-service environments. Licensed mechanics, machinists, and maintenance technicians typically select this fastener for equipment assemblies, fixtures, and precision hardware applications.

This screw is suited for light mechanical assemblies, instrument panels, machine components, and fixture work where a low-profile socket cap head and controlled clamping force are required. The 5-40 UNC thread is a fine-pitch unified coarse thread commonly found in small-diameter fastener applications across general manufacturing, electronics enclosures, and precision tooling. The partial threading allows for a smooth shank section that aids in alignment and shear loading within the assembly.

Key Features

• 5-40 UNC thread size with 1 inch length under head for reliable thread engagement
• Partially threaded shank for improved alignment and shear strength
• 3/32 inch internal hex drive for use with standard hex keys or Allen wrenches
• Alloy steel construction provides high tensile strength for the fastener class
• Black oxide finish coating adds mild corrosion resistance and reduces light reflection
• Meets ASME/ANSI B18.3 and ASTM A574 fastener standards

Compatibility

Designed as a standard 5-40 UNC hex socket cap screw suitable for tapped holes conforming to ASME/ANSI B18.3 specifications in mechanical assemblies, fixtures, and precision equipment applications.

Installation Notes

Installation is performed by machinists, maintenance technicians, or mechanical assemblers using a 3/32 inch hex key or Allen driver. Ensure the mating tapped hole is clean and free of debris before driving the screw. Do not exceed the design clamping load for the 5-40 thread class; overtightening alloy steel socket cap screws in soft or thin materials can strip threads or damage components. Follow applicable machine design standards and equipment service documentation for torque guidance specific to the assembly.