S-97715A538 1/4"-28 x 3/4" Brass Button Head Hex-Drive Screws
Brass Button Head Hex-Drive Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance from high-quality brass material, ideal for harsh industrial environments and outdoor applications.
- Exceptional thread precision with Class 3A fit and UNF fine threading ensures reliable, vibration-resistant connections in critical assemblies.
- High mechanical strength offering 50,000 psi tensile strength and Rockwell B55 hardness for durable, long-lasting fastening under load.
- Secure and efficient installation facilitated by the hex drive design and 5/32" drive size, preventing cam-out and enabling high torque application.
- Full threading along the 3/4" length provides maximum grip and uniform stress distribution across the entire fastened joint.
- Compliance with major environmental regulations including RoHS 3 and REACH, ensuring safety and suitability for regulated industries.
- Versatile rounded button head profile combines a low-profile, aesthetically pleasing finish with reduced risk of snagging in assembled products.
Professional Applications & Engineering Value
Engineered for precision and durability, these 1/4-28 UNF brass rounded head screws address common industrial challenges such as corrosion, vibration loosening, and the need for reliable, high-strength fastening. The fine UNF threading with Class 3A fit provides a tighter, more precise engagement than coarse threads, making them ideal for applications in electronics, marine hardware, and precision machinery where vibration resistance is critical. The brass material naturally resists rust and galvanic corrosion, extending service life in humid or chemically aggressive environments. Combined with a hex drive for secure tool engagement and a fully threaded design for maximum holding power, these screws deliver consistent performance in assembly lines, maintenance operations, and OEM equipment manufacturing.
Specification Summary & Compliance
This screw features a 1/4"-28 UNF fine thread with a Class 3A thread fit for high precision, a length of 3/4", and is fully threaded. It complies with RoHS 3 (2015/863/EU) under exemption 6(c) for lead in copper alloy and is REACH (EC 1907/2006) compliant, meeting essential environmental and safety standards for industrial use.
