S-92210A539 1/4"-20 x 5/8" ASME B18.3 Stainless Steel Hex Drive Flat Head Screws
Stainless Steel Hex Drive Flat Head 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 and passivated finish, ideal for harsh industrial environments
- Exceptional tensile strength of 70,000 psi ensures reliable performance under high-stress applications
- Precise Class 3A thread fit provides secure fastening with minimal risk of loosening in vibration-prone settings
- 82° countersink angle allows for a flush, professional finish that reduces snagging and improves safety
- Hex drive design (5/32") enables easy installation and removal with standard tools, speeding up assembly
- Full threading along the 5/8" length ensures maximum grip and uniform load distribution
- Compliance with ASME B18.3, RoHS 3, and REACH guarantees quality, safety, and environmental standards for global supply chains
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these 1/4"-20 UNC flat head screws in 18-8 stainless steel address common challenges like corrosion, vibration loosening, and assembly efficiency. The passivated finish enhances durability in moist or chemical-exposed settings, while the coarse thread spacing and Class 3A thread fit ensure quick, secure fastening in materials such as metal, plastic, and wood. Commonly used in machinery, automotive, and electronics assembly, their flat head profile and 82° countersink angle provide a smooth surface finish, reducing protrusions that could interfere with moving parts or safety protocols. This combination of material strength, precision threading, and regulatory compliance makes them a reliable choice for engineers seeking long-term performance and reduced maintenance costs.
Specification Summary & Compliance
This screw features a 1/4"-20 UNC thread with Class 3A fit and coarse spacing, ensuring tight tolerances per ASME B18.3. Dimensions include a 5/8" length, 0.531" head diameter, and standard flat head profile. It is fully manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, supporting environmentally responsible sourcing and use in regulated industries.
