S-91771A089 3-48 x 1/8" 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
- Enhanced flush mounting capability thanks to the 82° countersink angle and undercut flat head design
- Reliable fastening performance with 80,000 psi tensile strength and Rockwell B80 hardness for demanding applications
- Quick installation and removal using the standardized Phillips No. 1 drive system
- Consistent thread engagement ensured by Class 2A thread fit and fully threaded UNC coarse threading
- Broad compatibility with right-hand thread direction meeting common industrial equipment requirements
- Regulatory compliance assurance with RoHS 3 and REACH environmental standards
Professional Applications & Engineering Value
These 3-48 UNC flat head screws deliver exceptional engineering value in precision assembly applications where surface flushness and corrosion resistance are critical. The passivated 18-8 stainless steel construction provides superior protection against oxidation and chemical exposure, making them ideal for electronics enclosures, machinery panels, and instrumentation where environmental factors threaten fastener integrity. The undercut flat head profile ensures complete seating without protrusion, while the coarse UNC threading offers excellent holding power in various materials. With their Phillips No. 1 drive and standardized dimensions, these screws enable efficient installation in high-volume production environments while maintaining consistent performance across industrial applications.
Specification Summary & Compliance
Manufactured to exacting ASME B18.6.3 specifications, these screws feature Class 2A thread fit tolerances for reliable mating with corresponding threaded components. The 1/8" length and 3-48 UNC coarse thread configuration ensure dimensional consistency across production batches. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations confirms environmental responsibility, while the 82° countersink angle and fully threaded design maintain structural integrity in demanding industrial fastening applications.
