S-91771A092 3-48 x 1/4" 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
- Precise flush mounting enabled by standard 82° countersink angle and flat head design for seamless surface integration
- Optimized drive engagement through Phillips No. 1 drive system ensuring secure installation and reduced cam-out risk
- Consistent threading performance with fully threaded Class 2A UNC coarse threads providing excellent grip and vibration resistance
- Regulatory compliance assurance meeting ASME B18.6.3 specifications and international RoHS 3/REACH environmental standards
- Broad compatibility with right-hand thread direction and coarse thread spacing suitable for diverse industrial assembly applications
Professional Applications & Engineering Value
These 3-48 UNC flat head screws deliver critical engineering solutions where corrosion resistance and flush surface requirements are paramount. The passivated 18-8 stainless steel construction provides exceptional protection against oxidation and chemical exposure, making them ideal for industrial equipment, electronic enclosures, and marine applications. The combination of fully threaded coarse spacing and Class 2A thread fit ensures rapid installation and reliable holding power in materials prone to vibration loosening. The 82° countersink angle and Phillips No. 1 drive work synergistically to create secure, recessed fastening points that maintain structural integrity while preventing surface protrusion in precision assemblies.
Specification Summary & Compliance
Manufactured to exact ASME B18.6.3 specifications with Class 2A thread fit tolerances and UNC coarse thread profile. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Standard right-hand thread direction with 1/4" length and fully threaded design ensures consistent performance across industrial fastener applications.
