S-91781A589 5/16"-18 x 1 3/4" 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
- Exceptional corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments
- High tensile strength of 80,000 psi ensures reliable fastening under demanding mechanical loads
- Rockwell B80 hardness provides excellent durability and resistance to wear and deformation
- Class 2A thread fit with UNC coarse threading offers easy installation and secure holding power
- 82° countersink angle and flat head design enables flush mounting for streamlined surfaces
- Full threading and slotted drive allow for versatile application and straightforward manual installation
- Compliance with ASME B18.6.3, RoHS 3, and REACH guarantees quality and environmental safety standards
Professional Applications & Engineering Value
These 5/16"-18 UNC flat head screws are engineered to address critical industrial fastening challenges where corrosion resistance, mechanical strength, and precise fit are paramount. The 18-8 stainless steel material combined with a passivated finish significantly enhances longevity in moist or chemically aggressive environments, reducing maintenance costs and downtime. The fully threaded design with coarse UNC threading ensures rapid assembly and strong grip in materials like metal, wood, or composites. The 82° countersink angle allows the screw to sit flush, preventing snagging and improving aesthetic finish in applications such as machinery assembly, automotive components, and structural frameworks. These features make them a reliable choice for engineers seeking durable, compliant fasteners that meet rigorous industrial standards.
Specification Summary & Compliance
This product adheres to Class 2A thread fit per UNC standards, ensuring precise dimensional accuracy and interchangeability. Manufacturing follows ASME B18.6.3 specifications for consistency and reliability. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of hazardous substances and supporting environmental safety in industrial supply chains.
