S-92949A563 1/4"-28 x 5/8" 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 with 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments.
- Exceptional tensile strength of 70,000 psi ensures reliable, long-lasting fastening under high-stress conditions.
- Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies in critical applications.
- Easy installation and removal with a 5/32" hex drive, reducing tool slippage and improving assembly efficiency.
- Fully threaded design allows for consistent engagement along the entire 5/8" length, enhancing grip and load distribution.
- Compliance with ASME B18.3 standards guarantees consistent quality and interoperability in professional settings.
- Environmental regulatory adherence via RoHS 3 and REACH compliance, ensuring safe use in regulated industries.
Professional Applications & Engineering Value
This 1/4-28 UNF stainless steel rounded head screw is engineered to address common industrial challenges such as corrosion, vibration loosening, and assembly inefficiency. The 18-8 stainless steel material combined with a passivated finish significantly enhances durability in moist or chemical-exposed environments, reducing maintenance costs. Its fine thread spacing and Class 3A thread fit deliver superior holding power, minimizing the risk of failure in machinery, automotive, and electronics assemblies. The hex drive design ensures quick, secure fastening, while the rounded button head offers a low-profile, snag-resistant finish, making it ideal for applications where aesthetics and safety are priorities.
Specification Summary & Compliance
This fastener features a 1/4"-28 UNF thread with Class 3A fit for high precision, and is fully threaded over a 5/8" length. It conforms to ASME B18.3 manufacturing specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and industry-standard reliability.
