S-98164A435 4-40 x 1" 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 316 stainless steel construction, ideal for harsh environments and chemical exposure.
- High tensile strength of 70,000 psi ensures reliable performance under heavy loads and mechanical stress.
- Precise Class 3A thread fit guarantees tight tolerances and secure fastening in critical assemblies.
- Rockwell B55 hardness provides excellent durability and resistance to wear over extended use.
- Passivated finish enhances surface protection, reducing the risk of rust and extending service life.
- Fully threaded design allows for maximum grip and uniform load distribution along the entire length.
- Hex drive compatibility with 1/16" size enables easy installation and removal using standard tools.
Professional Applications & Engineering Value
These 4-40 UNC thread screws, made from 316 stainless steel, address common industrial challenges such as corrosion in marine, chemical processing, and outdoor equipment. The rounded head style and hex drive facilitate quick assembly in tight spaces, while the coarse thread spacing ensures rapid engagement and reduced cross-threading risks. With a passivated finish, they offer enhanced protection against oxidation, making them suitable for applications requiring long-term reliability and compliance with stringent environmental standards. Engineers value their consistent performance in industrial screws for machinery, electronics, and structural components where vibration resistance and material integrity are critical.
Specification Summary & Compliance
This screw features a Class 3A thread fit for high precision, adhering to ASME B18.3 standards. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety. Dimensions include a 1" length, 0.112" thread diameter, and coarse UNC threading, all manufactured to meet rigorous industrial specifications for reliability and performance.
