S-92949A749 1/2"-20 x 3/4" ASME B18.3 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 from 18-8 Stainless Steel and passivated finish, ideal for harsh environments and long-term reliability.
- High tensile strength of 70,000 psi ensures reliable performance under significant mechanical stress and vibration.
- Precise Class 3A thread fit provides excellent engagement and reduces the risk of cross-threading in critical assemblies.
- Secure hex drive (5/16") allows for high torque application and easy installation with standard tools.
- Fully threaded design offers consistent clamping force and versatility across various material thicknesses.
- Rounded button head profile delivers a low-profile, finished appearance while minimizing snagging risks.
- Compliance with ASME B18.3, RoHS 3, and REACH guarantees adherence to strict industrial and environmental safety standards.
Professional Applications & Engineering Value
This 1/2"-20 UNF Class 3A Rounded Head Screw is engineered to address common industrial challenges such as corrosion, high stress, and assembly precision. Constructed from 18-8 Stainless Steel with a passivated finish, it resists oxidation and chemical exposure, making it suitable for marine, chemical processing, and outdoor equipment. The fine thread (UNF) and Class 3A fit ensure tight, secure fastening in applications requiring vibration resistance, such as machinery, automotive components, and electronic enclosures. The hex drive design facilitates quick, high-torque installation, reducing labor time while the rounded head offers a safe, aesthetic finish. Ideal for OEMs and maintenance teams needing durable, fully threaded fasteners that meet rigorous performance and regulatory demands.
Specification Summary & Compliance
This screw features a 1/2"-20 UNF fine thread with Class 3A tolerance for precise fit, a length of 3/4", and a head diameter of 0.875". 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 it is free from hazardous substances and suitable for global industrial use.
