S-92210A126 5-40 x 1/4" 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 construction and passivated finish, ideal for harsh industrial environments
- High-strength performance delivering 70,000 psi tensile strength and Rockwell B55 hardness for reliable load-bearing applications
- Precision thread engagement with Class 3A thread fit ensuring secure fastening and vibration resistance in machinery assemblies
- Efficient installation through hex drive design and standard 82° countersink angle for flush mounting in precision components
- Enhanced durability with coarse UNC threading providing superior grip in soft materials and high-vibration settings
- Regulatory compliance meeting ASME B18.3 specifications for dimensional accuracy and RoHS 3/REACH environmental standards
- Versatile right-hand threading with fully threaded shank for uniform stress distribution across the entire fastener length
Professional Applications & Engineering Value
These 5-40 UNC flat head screws deliver critical engineering solutions where corrosion resistance and mechanical strength are paramount. The 18-8 stainless steel composition combined with passivated finish provides exceptional protection against chemical exposure and oxidation in manufacturing equipment, marine hardware, and food processing machinery. The hex drive design and standard 82° countersink enable precise, flush installations in tight-tolerance applications while preventing cam-out during high-torque assembly. With Class 3A thread fit and coarse thread spacing, these fasteners maintain secure connections in high-vibration environments, reducing maintenance frequency and downtime in industrial automation systems and structural frameworks.
Specification Summary & Compliance
Manufactured to ASME B18.3 dimensional standards with Class 3A thread fit precision and UNC coarse threading. Features include 5-40 thread size, 1/4" length, 82° countersink angle, and full threading. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations for environmental safety. Mechanical properties include 70,000 psi tensile strength and Rockwell B55 hardness certification.
