S-98164A428 4-40 x 1/8" 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 in harsh environments due to 316 Stainless Steel construction and passivated finish, ideal for chemical and marine applications.
- High tensile strength of 70,000 psi ensures reliable fastening under mechanical stress, reducing the risk of failure in demanding setups.
- Precise Class 3A thread fit provides tight, secure connections with minimal backlash, enhancing assembly accuracy and vibration resistance.
- Hex drive design (1/16") allows for easy installation and removal with standard tools, speeding up maintenance and reducing labor time.
- Fully threaded UNC coarse spacing enables quick engagement and strong holding power, suitable for a wide range of materials and thicknesses.
- Compliance with ASME B18.3, RoHS 3, and REACH guarantees adherence to industry standards, ensuring safety and environmental responsibility.
- Durable Rockwell B55 hardness maintains thread integrity and resists wear, extending service life in high-usage industrial settings.
Professional Applications & Engineering Value
These 4-40 UNC rounded head screws in 316 Stainless Steel with a passivated finish address critical challenges in corrosive and high-stress environments. The material's inherent resistance to chlorides and acids, combined with the Class 3A thread fit, ensures leak-proof and vibration-resistant assemblies in industries like chemical processing, marine equipment, and food machinery. The hex drive and fully threaded coarse spacing facilitate rapid installation, reducing downtime in production lines. By offering 70,000 psi tensile strength and compliance with ASME B18.3, these screws provide engineering reliability for applications where mechanical performance and regulatory adherence are paramount, such as in precision instruments and structural fastening.
Specification Summary & Compliance
This screw features precise Class 3A thread fit with UNC coarse thread spacing and adheres to ASME B18.3 manufacturing standards. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity for global industrial use.
