S-92949A856 5/16"-18 x 1 7/8" ASME B18.3, ASTM F879 Stainless Steel Button Head Hex-Drive Screws
Stainless Steel 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 with 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments
- Exceptional mechanical strength with 70,000 PSI tensile strength and Rockwell B55 hardness for reliable, long-term fastening
- Precision thread engagement through Class 3A thread fit and UNC coarse threading, ensuring secure installations and vibration resistance
- Efficient installation and removal with 3/16" hex drive and rounded button head design, reducing assembly time and tool slippage
- Full-threaded length provides maximum grip and load distribution across the entire 1-7/8" shaft
- Compliance with major industry standards including ASME B18.3 and ASTM F879, guaranteeing dimensional accuracy and performance reliability
- Environmentally responsible manufacturing with RoHS 3 and REACH compliance, meeting global regulatory requirements
Professional Applications & Engineering Value
This 18-8 stainless steel rounded head screw is engineered to address critical fastening challenges in demanding industrial settings. The passivated finish significantly enhances corrosion resistance, making it suitable for applications exposed to moisture, chemicals, or outdoor elements. With a Class 3A thread fit and UNC coarse threading, it ensures tight tolerances and rapid assembly in metal fabrication, machinery, and structural frameworks. The hex drive design and button head profile allow for high-torque installation without cam-out, reducing downtime in production lines. Its 70,000 PSI tensile strength and full threading provide secure, vibration-resistant connections in heavy-duty equipment, automotive assemblies, and construction projects where reliability is paramount.
Specification Summary & Compliance
This screw maintains precise Class 3A thread fit per UNC standards, with a diameter of 0.313" and coarse thread spacing. It is manufactured in compliance with ASME B18.3 and ASTM F879 specifications, ensuring consistent dimensional accuracy. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, adhering to stringent environmental and safety regulations for industrial components.
