S-91255A016 1-72 x 1/4" ASTM F835 Steel Button Head Hex-Drive Screws
Steel Button Head Hex-Drive Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Exceptional tensile strength of 120,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure.
- Precise Class 3A thread fit provides superior engagement and vibration resistance in fine-threaded applications, minimizing loosening over time.
- Black-oxide finish on alloy steel offers enhanced corrosion resistance and a durable, non-reflective surface suitable for harsh industrial environments.
- Hex drive design (0.050") allows for secure tool engagement and efficient installation, even in confined spaces.
- Fully threaded construction ensures consistent clamping force along the entire 1/4" length, improving joint stability.
- Rounded button head profile delivers a low-profile, aesthetically pleasing finish while reducing snagging risks in assembled products.
- Compliance with ASME B18.3 and ASTM F835 guarantees adherence to industry standards for dimensional accuracy and mechanical properties.
Professional Applications & Engineering Value
Engineered for precision assemblies, these 1-72 UNF fine thread rounded button head screws address critical needs in electronics, aerospace, and machinery where space constraints and vibration are concerns. The black-oxide alloy steel construction combats corrosion while maintaining a Rockwell C39 hardness, ensuring longevity in demanding conditions. The fine thread and Class 3A fit provide excellent resistance to loosening under dynamic loads, making them ideal for securing sensitive components. With a hex drive for easy installation and a fully threaded design for uniform stress distribution, they streamline maintenance and enhance reliability in industrial applications.
Specification Summary & Compliance
This screw features a 1-72 UNF fine thread with Class 3A fit for high precision, a length of 1/4", and is manufactured to ASME B18.3 and ASTM F835 specifications. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for global industrial use.
