S-92949A133 5-40 x 3/8" 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
- Exceptional corrosion resistance thanks to 18-8 Stainless Steel construction and passivated finish, ensuring long-term reliability in harsh environments.
- Superior load-bearing capability with a high 70,000 psi tensile strength, providing dependable performance under significant stress.
- Precise and secure fastening achieved with a Class 3A thread fit, minimizing the risk of loosening in critical assemblies.
- Easy installation and removal facilitated by the hex drive and coarse UNC thread spacing, reducing assembly time and effort.
- Compact, low-profile design with a rounded button head, ideal for applications where space is limited and a smooth surface is desired.
- Full thread engagement along the entire 3/8" length for maximum grip and holding power in a variety of material thicknesses.
- Guaranteed compliance and quality, meeting ASME B18.3 specifications and environmental standards like RoHS 3 and REACH.
Professional Applications & Engineering Value
These 5-40 UNC Rounded Head Screws are engineered to solve common industrial challenges, such as vibration-induced loosening and corrosion in demanding environments. The combination of 18-8 Stainless Steel and a passivated finish provides excellent resistance to oxidation and chemical exposure, making them ideal for electronics enclosures, machinery panels, and outdoor equipment. The hex drive and coarse thread spacing ensure quick, secure installation with standard tools, reducing labor time. The fully threaded design and Class 3A thread fit offer superior clamping force and vibration resistance, preventing joint failure in high-stress applications. This makes them a reliable choice for OEMs and maintenance teams requiring durable, precision industrial fasteners.
Specification Summary & Compliance
This product features a 5-40 UNC coarse thread with a Class 3A thread fit for high precision. Dimensions include a 3/8" length, 0.238" head diameter, and 5/64" hex drive. It is manufactured from 18-8 Stainless Steel with a Rockwell B55 hardness and meets ASME B18.3 specifications. The screw is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations.
