S-91772A114 4-40 x 7/8" 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 installation efficiency through Phillips No. 1 drive and rounded pan head design for secure, flush-fastening applications
- Precision thread engagement with Class 2A UNC coarse threads ensuring consistent mating and vibration resistance
- Full 7/8" threading provides maximum grip length and uniform stress distribution across connected components
- Regulatory compliance assurance meeting ASME B18.6.3 manufacturing standards for dimensional accuracy and performance reliability
- Environmental responsibility through RoHS 3 and REACH compliance, safe for restricted substance-sensitive applications
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these 4-40 UNC machine screws deliver critical performance where corrosion resistance and mechanical integrity are paramount. The passivated 18-8 stainless steel construction prevents oxidation in moisture-prone environments, while the coarse UNC threading and Class 2A thread fit ensure rapid assembly and reliable vibration resistance in machinery, electronic enclosures, and automotive components. The combination of 70,000 psi tensile strength and fully threaded 7/8" length provides superior clamping force distribution, making these Phillips drive screws ideal for applications requiring repeated disassembly and reassembly without thread degradation.
Specification Summary & Compliance
Manufactured to ASME B18.6.3 specifications with Class 2A thread fit tolerances for consistent dimensional accuracy. Features 4-40 UNC coarse threads with right-hand direction and full 7/8" threading. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring adherence to international substance restriction standards for industrial components.
