S-97763A302 4-40 x 5/16" 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
- Exceptional corrosion resistance with Black-Oxide coated 18-8 Stainless Steel, ideal for harsh industrial environments.
- High tensile strength of 70,000 psi ensures reliable performance under heavy loads and vibration.
- Precise Class 3A thread fit provides superior engagement and reduces the risk of cross-threading during assembly.
- Full threading along the 5/16" length offers maximum grip and uniform stress distribution in fastened materials.
- Hex drive (1/16") design allows for easy installation and removal with standard tools, improving assembly efficiency.
- Rockwell B55 hardness enhances durability and wear resistance for long-term use in demanding applications.
- Compliance with ASME B18.3, RoHS 3, and REACH ensures adherence to industry standards and environmental safety regulations.
Professional Applications & Engineering Value
This 4-40 UNC thread rounded head screw is engineered to address common industrial challenges, such as corrosion and mechanical stress. The Black-Oxide 18-8 Stainless Steel construction provides excellent protection against rust and chemical exposure, making it suitable for industrial applications in machinery, electronics, and outdoor equipment. With a coarse thread spacing and Class 3A thread fit, it ensures quick, secure fastening in materials prone to stripping, reducing assembly time and maintenance costs. The fully threaded design and right-hand thread direction offer consistent clamping force, essential for heavy-duty fasteners in high-vibration environments. By integrating these features, it delivers reliable performance and extends service life in critical engineering setups.
Specification Summary & Compliance
This screw adheres to precise dimensional standards, including Class 3A thread fit and UNC thread type with a size of 4-40. It is manufactured in compliance with ASME B18.3 specifications, ensuring consistent quality and interchangeability. Additionally, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for use in various industrial and consumer products without hazardous substances.
