S-91500A090 2-56 x 1/2" ASME B18.6.3 Stainless Steel Phillips Flat Head Screws
Stainless Steel Phillips Flat Head 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 316 stainless steel construction and passivated finish, ideal for harsh industrial environments
- High tensile strength of 70,000 psi ensures reliable performance under demanding mechanical loads
- Precise Class 2A thread fit guarantees smooth installation and secure fastening in UNC coarse threaded applications
- Standard 82° countersink angle provides flush mounting for clean, professional finishes
- Full threading design offers maximum grip length and uniform stress distribution
- Phillips No. 1 drive compatibility enables efficient installation with common industrial tools
- Rockwell B80 hardness rating maintains structural integrity through repeated use and vibration
Professional Applications & Engineering Value
These 316 stainless steel flat head screws deliver exceptional value in demanding industrial applications where corrosion resistance and mechanical reliability are paramount. The combination of 70,000 psi tensile strength and Rockwell B80 hardness ensures these 2-56 UNC coarse thread fasteners withstand vibration, thermal cycling, and mechanical stress in machinery assembly, electronic enclosures, and marine equipment. The passivated finish provides an additional protective layer against chemical exposure and atmospheric corrosion, while the standard 82° countersink angle and Phillips drive facilitate quick, flush installations in precision manufacturing environments. These fully threaded machine screws are engineered to maintain clamping force integrity in critical assemblies where fastener failure is not an option.
Specification Summary & Compliance
Manufactured to exacting ASME B18.6.3 specifications with Class 2A thread fit tolerance for precise engagement. Features 2-56 UNC coarse thread spacing with right-hand threading and standard flat head profile. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets. The fully threaded design maintains consistent mechanical properties throughout the 1/2" length for reliable performance in automated assembly systems.
