S-92949A415 4-40 x 2" ASME B18.3, ASTM F879 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 industrial environments
- High tensile strength of 70,000 PSI ensures reliable, long-lasting fastening under demanding mechanical loads
- Precise Class 3A thread fit provides consistent engagement and reduces the risk of cross-threading during installation
- Fully threaded design offers maximum grip and uniform load distribution across the entire fastener length
- Hex drive (1/16") with rounded button head allows for easy installation in confined spaces while providing a low-profile, finished appearance
- Compliance with ASME B18.3, RoHS 3, and REACH guarantees adherence to strict industry standards and environmental regulations
- Coarse UNC thread spacing enables quick assembly and disassembly, reducing labor time in high-volume applications
Professional Applications & Engineering Value
Engineered for industrial fastening solutions, these 4-40 UNC thread rounded head screws address critical challenges in machinery assembly, electronics enclosures, and precision equipment. The 18-8 stainless steel material combined with a passivated finish significantly enhances corrosion resistance, preventing failure in humid or chemically aggressive settings. The fully threaded and Class 3A fit design ensures tight, secure connections that withstand vibration and thermal cycling, reducing maintenance needs. With a 70,000 PSI tensile strength and hex drive for torque control, these screws deliver consistent performance in automated production lines and critical structural applications, supporting operational efficiency and safety.
Specification Summary & Compliance
This product features a 4-40 UNC coarse thread with Class 3A fit for high precision and meets ASME B18.3 specifications. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity. The right-hand thread and standardized dimensions support interchangeability and reliable performance in regulated industrial environments.
