S-91771A184 3-56 x 3/16" 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 passivated 18-8 stainless steel construction, ideal for harsh industrial environments
- Exceptional tensile strength rated at 80,000 PSI for reliable performance in demanding applications
- Precision Class 2A thread fit ensures smooth installation and secure fastening with minimal play
- Optimized 82° countersink angle provides flush mounting and clean aesthetic finish
- Full threading design delivers maximum grip length and superior holding power
- Phillips drive compatibility enables efficient installation with standard tools
- Comprehensive regulatory compliance meets ASME B18.6.3 standards and environmental regulations including RoHS 3 and REACH
Professional Applications & Engineering Value
These 3-56 UNF flat head Phillips screws deliver exceptional engineering value in precision assembly applications where corrosion resistance and reliable fastening are critical. The passivated 18-8 stainless steel construction provides superior protection against oxidation and chemical exposure, making them ideal for electronics enclosures, medical devices, and marine equipment. The fine thread spacing and Class 2A thread fit ensure vibration-resistant connections in thin materials, while the 82° countersink angle allows for flush mounting in precision-machined components. The combination of 80,000 PSI tensile strength and fully threaded design creates durable, long-lasting fastening solutions that withstand mechanical stress and environmental challenges in industrial settings.
Specification Summary & Compliance
This 3-56 UNF flat head screw features precision Class 2A thread fit with fine thread spacing in right-hand threading configuration. Manufactured to ASME B18.6.3 specifications with inch system measurements including 3/16" length and standard flat head profile. The screws are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial applications while maintaining dimensional accuracy and performance reliability.
