S-92949A330 5-40 x 3/16" 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 environments.
- Exceptional mechanical strength offering 70,000 psi tensile strength and Rockwell B55 hardness for reliable, long-term performance.
- Precise, secure fastening ensured by Class 3A thread fit and UNC coarse threading, reducing cross-threading risks.
- Efficient installation and removal with a 5/64" hex drive, providing excellent torque transfer and tool accessibility.
- Compact, low-profile design with a rounded button head, minimizing protrusion while maintaining a secure hold.
- Full threading along the 3/16" length for maximum grip and uniform stress distribution in assemblies.
- Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory adherence.
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these 5-40 UNC rounded head screws address critical challenges in machinery, electronics, and automotive assemblies. The 18-8 Stainless Steel material, combined with a passivated finish, provides outstanding resistance to corrosion and oxidation, extending service life in humid or chemically aggressive settings. The hex drive design and coarse threading facilitate quick, secure installations, reducing assembly time and preventing stripping. With a Class 3A thread fit, these screws ensure tight tolerances and vibration resistance, making them ideal for precision equipment where reliability is paramount. Their fully threaded configuration enhances load distribution, minimizing the risk of joint failure under stress.
Specification Summary & Compliance
This screw adheres to ASME B18.3 specifications, with precise dimensions including a 0.125" thread diameter, 3/16" length, and Class 3A thread fit for high accuracy. It features UNC coarse threading and a right-hand thread direction, manufactured from 18-8 Stainless Steel with a passivated finish. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) ensures environmental safety and regulatory alignment for global industrial use.
