S-91771A884 2-56 x 5/32" 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 mechanical strength with 80,000 psi tensile strength and Rockwell B80 hardness for reliable load-bearing performance
- Optimized flush mounting featuring undercut flat head profile and 82° countersink angle for seamless surface integration
- Enhanced driving efficiency with Phillips No. 1 drive design reducing cam-out risks during installation
- Precision thread engagement through UNC coarse threading with Class 2A fit ensuring consistent fastening accuracy
- Full regulatory compliance meeting ASME B18.6.3 specifications plus RoHS 3 and REACH environmental standards
- Complete thread coverage with fully threaded 5/32" length providing maximum grip in shallow applications
Professional Applications & Engineering Value
Engineered for precision-critical assemblies, these 2-56 UNC flat head screws deliver exceptional performance in industrial machinery, electronic enclosures, and aerospace components. The passivated 18-8 stainless steel construction provides superior resistance to corrosion and chemical exposure, while the undercut head profile ensures flush mounting without protrusion interference. The Phillips No. 1 drive system offers reliable torque transmission, and the coarse UNC threading with Class 2A fit maintains secure fastening in vibration-prone environments. These machine screws are particularly valuable in applications requiring high-strength fasteners with strict dimensional compliance and environmental regulation adherence.
Specification Summary & Compliance
Manufactured to ASME B18.6.3 standards with Class 2A thread fit and UNC coarse threading. Features include 5/32" length, 82° countersink angle, and full threading. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Material certification confirms 18-8 stainless steel with passivated surface treatment and mechanical properties including 80,000 psi tensile strength and Rockwell B80 hardness.
