S-91771A593 5/16"-18 x 2 1/2" ASME B18.6.3 Stainless Steel Phillips Flat Head Screws
Stainless Steel Phillips 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 passivated 18-8 stainless steel construction, ensuring long-term reliability in harsh industrial environments.
- High tensile strength of 80,000 psi provides exceptional load-bearing capacity and prevents fastener failure under stress.
- Precise Class 2A thread fit guarantees smooth installation and secure fastening with standard UNC coarse threading.
- Partially threaded design allows for controlled clamping force and optimal grip in assembly applications.
- Standard 82° countersink angle ensures a flush, professional finish when installed in countersunk holes.
- Phillips drive (No. 4 size) offers widespread tool compatibility and efficient installation with common drivers.
- Compliance with ASME B18.6.3, RoHS 3, and REACH ensures adherence to strict quality, safety, and environmental standards.
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these 5/16"-18 UNC flat head screws solve critical fastening challenges where corrosion resistance and structural integrity are paramount. The passivated 18-8 stainless steel material effectively combats oxidation and chemical exposure, making these Phillips drive screws ideal for machinery, marine equipment, and outdoor structures. The partially threaded configuration provides superior grip and vibration resistance in assemblies requiring precise tension control. With a coarse thread spacing and Class 2A thread fit, they ensure quick installation and reliable performance in high-stress environments, reducing maintenance needs and downtime.
Specification Summary & Compliance
This product features a 2 1/2" length with 1 1/2" minimum thread length, UNC coarse threads, and Class 2A thread fit for precise dimensional accuracy. Manufacturing and quality adhere to ASME B18.6.3 specifications, with full compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe and sustainable use across global industrial sectors.
