S-91772A128 5-40 x 1/2" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws
Stainless Steel Pan Head Phillips 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, ideal for harsh industrial environments
- Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for reliable load-bearing performance
- Optimized drive engagement through Phillips No. 2 drive design, preventing cam-out and ensuring secure fastening
- Precise thread compatibility with UNC coarse threading and Class 2A fit, enabling quick installation and vibration resistance
- Full-threaded design maximizing grip length and distribution of clamping force along the entire 1/2" length
- Standard pan head profile providing a low-profile, rounded finish that sits flush without snagging
- Regulatory compliance assurance meeting ASME B18.6.3 specifications and environmental standards like RoHS 3 and REACH
Professional Applications & Engineering Value
Engineered for demanding industrial assembly and machinery applications, these 5-40 UNC pan head Phillips screws deliver critical performance where corrosion resistance and structural integrity are paramount. The passivated 18-8 stainless steel material effectively resists oxidation and chemical exposure, extending service life in challenging conditions. With a coarse thread spacing and Class 2A thread fit, these screws facilitate rapid installation while maintaining tight tolerances, reducing the risk of loosening under dynamic loads. The combination of 70,000 psi tensile strength and fully threaded design ensures uniform stress distribution, making them ideal for securing components in electronic enclosures, automotive assemblies, and heavy-duty equipment where vibration and thermal cycling are common.
Specification Summary & Compliance
This 5-40 UNC screw adheres to precise dimensional standards, including Class 2A thread fit for consistent engagement and 1/2" length with full threading. Manufactured in compliance with ASME B18.6.3, it ensures interchangeability and reliability. The product is verified as RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming adherence to strict environmental and safety regulations for hazardous substances.
