S-92949A581 5/16"-18 x 3/4" ASME B18.3 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.
- High tensile strength of 70,000 psi ensures reliable performance and prevents failure under heavy loads.
- Precise Class 3A thread fit provides secure, vibration-resistant connections in demanding applications.
- Hex drive design allows for high-torque installation and easy assembly with standard tools.
- Rounded button head profile offers a low-profile, finished appearance while reducing snagging risks.
- Full threading along the 3/4" length ensures maximum grip and holding power.
- Compliance with major standards including ASME B18.3, RoHS 3, and REACH guarantees quality and environmental safety.
Professional Applications & Engineering Value
This 18-8 stainless steel rounded head screw is engineered to solve critical challenges in industrial assembly and machinery. Its passivated finish significantly enhances corrosion resistance, making it suitable for outdoor equipment, marine applications, and chemical processing plants where moisture and corrosive agents are present. The coarse UNC threads and Class 3A fit ensure quick, secure fastening in materials like steel and aluminum, reducing the risk of cross-threading and loosening under vibration. The hex drive design accommodates high installation torque, which is essential for maintaining joint integrity in heavy-duty frameworks, conveyor systems, and automotive components. With a Rockwell B55 hardness and robust construction, it delivers long-term reliability, minimizing maintenance downtime and replacement costs.
Specification Summary & Compliance
This screw features a 5/16"-18 UNC coarse thread with a precise Class 3A thread fit for accurate engagement. Dimensions include a 3/4" length, 0.547" head diameter, and hex drive size of 3/16". It is manufactured in compliance with ASME B18.3 specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safety and consistency for industrial use.
