S-91858A552 1/4"-20 x 2 1/2" ASME B18.6.3 Stainless Steel Slotted Flat Head Screws
Stainless Steel Slotted 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 316 stainless steel construction, ideal for harsh chemical and marine environments
- Enhanced durability and longevity from passivated finish that increases surface hardness and prevents rust
- Reliable fastening performance with UNC coarse threading providing excellent grip and reduced cross-threading risk
- High tensile strength of 70,000 psi ensures secure connections in demanding industrial applications
- Precise flush mounting with standard 82° countersink angle for smooth surface finishes
- Optimized thread engagement through partial threading design for controlled clamping force
- Consistent quality assurance with Class 2A thread fit ensuring proper assembly and interchangeability
Professional Applications & Engineering Value
This 316 stainless steel flat head screw delivers exceptional performance in corrosive environments where standard fasteners fail. The combination of marine-grade 316 stainless steel and passivated surface treatment creates a protective barrier against chemical exposure, saltwater, and industrial contaminants. The UNC coarse thread pattern ensures quick installation and reliable holding power in various materials, while the partial threading design prevents over-tightening and material damage. Engineered for industrial machinery, marine equipment, chemical processing systems, and food processing applications, this screw maintains structural integrity under continuous stress and exposure. The slotted drive style provides compatibility with standard tools, making it versatile for maintenance and assembly operations across multiple sectors.
Specification Summary & Compliance
This flat head screw features Class 2A thread fit per ASME B18.6.3 specifications, ensuring precise dimensional accuracy and interchangeability. The 1/4"-20 UNC coarse thread with right-hand direction provides standardized fastening compatibility. Manufacturing complies with ASME B18.6.3 standards for dimensional requirements and mechanical properties. The product is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant regarding substance restrictions, making it suitable for regulated industries and international markets.
