S-91794A126 5-40 x 3/8" 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
- Exceptional corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments
- Superior mechanical strength delivering 70,000 psi tensile strength and Rockwell B55 hardness for reliable, long-term fastening
- Optimized installation efficiency with slotted drive and high, narrow fillister head design for easy tool access and reduced cam-out
- Precise thread engagement featuring Class 2A UNC coarse threads for quick assembly and vibration resistance in machinery
- Full threading along the 3/8" length ensures maximum grip and uniform load distribution across joined components
- Compliance with major industry standards including ASME B18.6.3, guaranteeing dimensional accuracy and interchangeability
- Environmentally responsible manufacturing with RoHS 3 and REACH compliance for safe use in regulated applications
Professional Applications & Engineering Value
These 5-40 UNC rounded head screws are engineered to address critical challenges in precision assembly and machinery maintenance. The 18-8 stainless steel material, combined with a passivated finish, provides excellent resistance to oxidation and chemical exposure, making them suitable for industrial equipment, electronic enclosures, and marine components. The fillister head style with a slotted drive offers a low-profile, high-strength fastening solution that minimizes protrusion while allowing secure tool engagement. With coarse UNC threads and Class 2A fit, these screws ensure rapid installation and reliable performance in applications subject to vibration or thermal cycling, reducing maintenance downtime and enhancing operational safety.
Specification Summary & Compliance
This screw meets ASME B18.6.3 specifications for dimensional consistency, featuring a 5-40 UNC thread with Class 2A tolerance for precise fit. The fully threaded 3/8" length and coarse thread spacing support efficient assembly. Regulatory compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring adherence to environmental and safety standards.
