S-92210A438 5/16"-24 x 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 for extended service life in harsh environments
- Exceptional thread reliability with Class 3A fit ensuring precise, vibration-resistant connections in critical applications
- High tensile strength performance rated at 70,000 psi for demanding mechanical assemblies and structural applications
- Optimized flush mounting with standard 82° countersink angle providing smooth surface finishes and improved aerodynamics
- Secure installation control through hex drive design allowing high torque application without cam-out risks
- Full thread engagement along the entire 4" length for maximum grip strength and load distribution
- Consistent hardness properties at Rockwell B55 ensuring dimensional stability under repeated stress cycles
Professional Applications & Engineering Value
These 18-8 stainless steel flat head screws with Class 3A thread fit deliver critical performance advantages in precision engineering applications. The combination of passivated finish and UNF fine threading provides superior corrosion resistance while maintaining tight tolerances in vibration-prone environments. The 82° countersink angle ensures flush mounting in machinery, aerospace components, and marine equipment where surface protrusions compromise performance. With hex drive compatibility and fully threaded design, these fasteners enable rapid assembly in confined spaces while distributing mechanical loads evenly across the entire 4" length. The Rockwell B55 hardness maintains thread integrity during repeated disassembly cycles, making them ideal for maintenance-intensive industrial equipment.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 3A thread fit precision and UNF 5/16"-24 fine thread spacing. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Features include right-hand threading, 0.313" thread diameter, and standard flat head profile with 82° countersink angle for industry-standard compatibility.
