S-91771A119 4-40 x 1 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 passivated 18-8 stainless steel construction for extended service life in harsh environments
- Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B80 hardness for reliable performance under stress
- Precision thread engagement with Class 2A thread fit ensuring consistent fastening and vibration resistance
- Optimized drive efficiency through Phillips No. 1 drive design providing secure torque transmission
- Flush mounting capability with standard 82° countersink angle and flat head profile for seamless surface integration
- Full-threaded design delivering maximum grip length and load distribution across the entire fastener
- Regulatory compliance assurance meeting ASME B18.6.3 specifications and environmental standards (RoHS 3 & REACH)
Professional Applications & Engineering Value
These 4-40 UNC flat head Phillips screws provide critical solutions for industrial applications demanding both corrosion resistance and structural integrity. The passivated 18-8 stainless steel construction prevents oxidation in moisture-prone environments, while the coarse thread spacing and Class 2A thread fit ensure rapid installation and secure fastening in materials ranging from machinery housings to electronic enclosures. The fully threaded 1-1/2" length offers complete engagement depth for vibration-resistant assemblies, making these fasteners ideal for manufacturing equipment, automotive components, and marine hardware where reliability and compliance with ASME B18.6.3 standards are paramount.
Specification Summary & Compliance
Manufactured to precise dimensional tolerances with Class 2A thread fit and UNC coarse thread spacing. Complies with ASME B18.6.3 mechanical standards and maintains full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Features standard 82° countersink angle and right-hand thread direction for universal compatibility with industrial fastening systems.
