S-92949A838 1/4"-20 x 1 7/8" 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, ideal for harsh environments
- Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for heavy-duty applications
- Precise, reliable fastening ensured by Class 3A thread fit and UNC coarse threading for vibration resistance
- Efficient installation and removal with hex drive design and rounded button head for reduced tool slippage
- Full-thread engagement along the 1 7/8" length provides maximum grip and load distribution
- Regulatory peace of mind with compliance to ASME B18.3, RoHS 3, and REACH standards
- Dimensional consistency in inch measurements for seamless integration with existing industrial assemblies
Professional Applications & Engineering Value
This 18-8 stainless steel rounded head screw delivers critical performance in demanding industrial settings where corrosion, vibration, and high tensile loads are common challenges. The passivated finish significantly enhances surface durability, preventing rust and chemical degradation in marine, chemical processing, and outdoor equipment. Its UNC coarse thread and Class 3A fit ensure tight, secure connections that resist loosening under dynamic stresses, while the hex drive and rounded head design allow for high-torque installation without damaging the fastener. Fully threaded along its length, it offers uniform clamping force, making it suitable for machinery, structural frames, and assembly lines requiring reliable, long-lasting fastening solutions.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 3A thread fit and UNC 1/4"-20 coarse threading. The screw is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards are met. Dimensional accuracy is maintained in inch units, with a length of 1 7/8", head diameter of 0.437", and hex drive size of 5/32" for consistent performance across industrial applications.
