S-92949A850 1/4"-28 x 3 1/2" ASME B18.3, ASTM F879 Stainless Steel Button Head Hex-Drive Screws
Stainless 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
- Superior corrosion resistance with 18-8 stainless steel construction and passivated finish for extended service life in harsh environments
- Precise thread engagement with Class 3A UNF fine threading ensures secure, vibration-resistant fastening in critical applications
- Exceptional mechanical strength delivering 70,000 psi tensile strength and Rockwell B55 hardness for heavy-duty load requirements
- Optimized installation efficiency through hex drive design (5/32") providing positive torque transmission and reduced tool slippage
- Enhanced surface compatibility with rounded button head profile preventing surface damage while maintaining low-profile appearance
- Full-threaded design maximizes grip length and load distribution across the entire fastener length
- Regulatory compliance assurance meeting ASME B18.3 standards for consistent quality and dimensional accuracy
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these 18-8 stainless steel rounded head screws solve critical fastening challenges where corrosion resistance and mechanical reliability are paramount. The Class 3A UNF fine threading provides superior vibration resistance in machinery, automotive assemblies, and precision equipment, while the passivated finish enhances corrosion protection in chemical processing and marine environments. The combination of 70,000 psi tensile strength and fully threaded design ensures maximum load distribution, making these heavy-duty fasteners ideal for structural applications requiring repeated disassembly and reassembly without performance degradation.
Specification Summary & Compliance
Manufactured to precision Class 3A thread fit with UNF 1/4"-28 fine threading and dimensional compliance with ASME B18.3 specifications. Full regulatory adherence to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring material safety and environmental responsibility in industrial supply chains.
