S-91773A077 2-56 x 1/4" ASME B18.6.3 Stainless Steel Round Head Phillips Screws
Stainless Steel Round 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 thanks to 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments
- Exceptional mechanical strength with 100,000 psi tensile strength and Rockwell B100 hardness for reliable performance under high stress
- Precise thread engagement ensured by Class 2A thread fit and UNC coarse threading for secure fastening and reduced cross-threading risk
- Optimized drive efficiency with No. 1 Phillips drive and rounded head design for easy installation and reduced cam-out
- Full thread coverage across the entire 1/4" length provides maximum grip and load distribution in assemblies
- Regulatory compliance with ASME B18.6.3 manufacturing standards ensures consistent quality and interchangeability
- Environmental safety through RoHS 3 and REACH compliance, making them suitable for regulated industries
Professional Applications & Engineering Value
These 2-56 UNC rounded head Phillips screws deliver critical performance in precision engineering applications where corrosion resistance and mechanical reliability are paramount. The 18-8 stainless steel material combined with passivated finish effectively combats oxidation and chemical exposure in demanding environments like electronics enclosures, medical devices, and marine equipment. The coarse UNC threading and Class 2A thread fit provide excellent engagement in various materials while minimizing installation time. With 100,000 psi tensile strength, these fully threaded fasteners maintain structural integrity in vibration-prone assemblies, preventing joint failure and reducing maintenance cycles. The combination of No. 1 Phillips drive and rounded head profile offers superior torque transmission while protecting adjacent surfaces from damage.
Specification Summary & Compliance
This 2-56 UNC screw features precision Class 2A thread fit with coarse threading and full 1/4" length. Manufactured to ASME B18.6.3 specifications for dimensional accuracy and performance consistency. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors.
