S-91772A117 4-40 x 11/16" 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. 1 drive design, preventing cam-out during high-torque installation
- Precision thread compatibility with Class 2A UNC coarse threads ensuring secure fastening in various materials
- Full-threaded design maximizing grip length and distribution of clamping force across the entire 11/16" length
- Standard-compliant manufacturing meeting ASME B18.6.3 specifications for consistent quality and interchangeability
- Environmental compliance with RoHS 3 and REACH regulations, ensuring safe use in regulated industries
Professional Applications & Engineering Value
These 4-40 UNC rounded pan head screws deliver critical performance advantages in industrial assembly applications where corrosion resistance and mechanical reliability are paramount. The passivated 18-8 stainless steel construction provides excellent protection against oxidation and chemical degradation, making them ideal for machinery, electronic enclosures, and outdoor equipment. The coarse UNC threading ensures rapid installation and superior holding power in both metallic and non-metallic materials, while the pan head profile offers a low-profile finish that doesn't compromise on drive engagement. With their fully threaded design and Phillips drive compatibility, these screws eliminate the need for multiple fastener types in your inventory while maintaining consistent performance across diverse assembly requirements.
Specification Summary & Compliance
Manufactured to exacting ASME B18.6.3 standards with Class 2A thread fit tolerances for precision engagement. The UNC coarse thread pattern (40 TPI) ensures reliable performance in various materials. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming adherence to international substance restrictions. Mechanical properties include 70,000 psi tensile strength and Rockwell B70 hardness, validated through standardized testing protocols.
