S-91794A786 1/4"-28 x 1" ASME B18.6.3 Stainless Steel Fillister Head Slotted Screws
Stainless Steel Fillister Head Slotted 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, ideal for harsh industrial environments
- Enhanced torque transmission from the high, narrow Fillister head design for secure fastening applications
- Precision alignment and reliable seating with Class 2A thread fit ensuring consistent assembly performance
- High tensile strength of 70,000 psi provides exceptional load-bearing capacity for demanding mechanical applications
- Excellent wear resistance due to Rockwell B55 hardness, extending service life in high-vibration settings
- Full threading along the 1" length offers maximum grip and uniform stress distribution
- Regulatory compliance assurance with RoHS 3 and REACH, meeting global environmental standards
Professional Applications & Engineering Value
This 1/4"-28 UNF Fillister Head Slotted Screw delivers critical engineering solutions where precision and durability are paramount. The 18-8 stainless steel material provides excellent resistance to oxidation and chemical exposure, making it suitable for industrial equipment, marine components, and food processing machinery. The high, narrow rounded head profile allows for deeper tool engagement and reduced risk of cam-out during installation. Combined with fine thread spacing and Class 2A thread fit, it ensures vibration resistance and maintains clamping force in dynamic applications. These features address common challenges like fastener loosening, corrosion-induced failure, and assembly inconsistency, providing reliable performance in precision mechanical systems.
Specification Summary & Compliance
This screw maintains Class 2A thread fit per UNF standards with precise dimensional control including 0.25" thread diameter and 0.414" head diameter. Manufacturing adheres to ASME B18.6.3 specifications for dimensional consistency and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance in global markets.
