Value Collection 701139PR Button Socket Cap Screw 1/4-28

Product Description

The VALUE COLLECTION 701139PR is a button socket cap screw designed for applications requiring a low-profile fastener with a hex socket drive. Machined from alloy steel and finished with a black oxide coating, this screw offers a hardness rating of 36-43 HRC and meets ANSI/ASME B18.3 and ASTM F835 standards. The 1/4-28 UNF thread and fully threaded 1-1/2 inch shank provide strong clamping force in tight clearance situations. The 5/32 inch hex socket drive is compatible with standard hex keys and L-wrenches used in mechanical assembly and maintenance work.

This fastener is suited for mechanical assemblies, machine frames, fixtures, and tooling applications where a flush or near-flush head profile is required. The black oxide finish provides mild corrosion resistance and reduces light reflection, making it a common choice in industrial machinery, equipment enclosures, and precision assemblies. Licensed contractors and mechanical technicians working in HVAC equipment, panel fabrication, or general industrial maintenance will encounter this fastener type in OEM and field applications.

Key Features

• Button head profile provides low clearance and a finished appearance
• Alloy steel construction with 36-43 HRC hardness rating for high-strength fastening
• Black oxide coating for mild corrosion resistance and reduced reflectivity
• Fully threaded 1/4-28 UNF right-hand thread for consistent engagement
• 5/32 inch hex socket drive compatible with standard hex keys
• Conforms to ANSI/ASME B18.3 and ASTM F835 fastener standards

Compatibility

Designed as a standard UNF button socket cap screw conforming to ANSI/ASME B18.3 and ASTM F835, suitable for use in applications requiring a 1/4-28 fully threaded fastener with a button head and hex socket drive.

Installation Notes

Installation requires a 5/32 inch hex key or L-wrench; use a torque wrench rated for the application to avoid over-driving the button head. Ensure mating threads are clean and free of debris before installation. Thread fit class 3A indicates a standard tolerance fit appropriate for most mechanical assemblies. Right-hand thread direction applies - turn clockwise to tighten.