S-91781A554 1/4"-20 x 3" 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 18-8 Stainless Steel and passivated finish for long-lasting performance in harsh environments.
- Exceptional mechanical strength offering 80,000 psi tensile strength and Rockwell B80 hardness for reliable, heavy-duty fastening.
- Optimized thread engagement through UNC coarse spacing and Class 2A fit, ensuring quick assembly and secure hold.
- Flush, professional installation with a standard flat head profile and 82° countersink angle for a smooth, unobtrusive finish.
- Versatile partial threading allowing for precise clamping force control and reduced risk of cross-threading.
- Rigorous quality assurance by complying with ASME B18.6.3 standards, guaranteeing dimensional accuracy and performance reliability.
- Environmentally responsible manufacturing with RoHS 3 and REACH compliance, ensuring safety and sustainability.
Professional Applications & Engineering Value
Engineered for demanding industrial settings, these 1/4"-20 x 3" Flat Head Slotted Screws provide a robust solution where corrosion resistance and high tensile strength are critical. The 18-8 Stainless Steel material, enhanced by a passivated finish, effectively combats rust and chemical exposure in marine, food processing, and outdoor applications. The UNC coarse thread and Class 2A fit facilitate faster installation with reduced galling, while the partial threading design allows for better stress distribution, minimizing material fatigue. Ideal for machinery, structural assemblies, and equipment requiring flush-mounted fasteners, these screws ensure long-term reliability and ease of maintenance, supporting efficient production and reduced downtime.
Specification Summary & Compliance
This screw features precise Class 2A thread fit and UNC coarse thread with a diameter of 0.25" and minimum thread length of 1 1/2". Manufactured to ASME B18.6.3 specifications, it guarantees dimensional consistency and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring it meets stringent environmental and safety standards for industrial use.
