S-91099A420 12-24 x 3/4" 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
- Optimized flush installation featuring an 82° countersink angle and undercut flat head design for seamless surface finishing
- Enhanced driving efficiency with Phillips No. 3 drive style, reducing cam-out risks during high-torque applications
- Precision thread engagement through Class 2A thread fit and coarse 12-24 UNC threading, ensuring vibration-resistant fastening
- Full-threaded design maximizes grip length and distributes stress evenly across the entire 3/4" shaft
- Regulatory compliance assurance meeting ASME B18.6.3, RoHS 3, and REACH standards for global industrial use
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these flat head screws deliver critical solutions where surface flushness and corrosion resistance are paramount. The passivated 18-8 stainless steel construction provides excellent protection against oxidation and chemical exposure, making them ideal for machinery, electrical enclosures, and outdoor equipment. The combination of coarse 12-24 UNC threads and Class 2A thread fit ensures rapid installation and secure fastening in soft metals or plastics, while the undercut head design prevents material protrusion for cleaner assemblies. With fully threaded coverage and 82° countersink angle, these screws maintain consistent clamping force in high-vibration environments, reducing maintenance frequency and improving operational reliability.
Specification Summary & Compliance
This 3/4" flat head screw adheres to inch system dimensions with Class 2A thread fit tolerance and UNC coarse thread spacing. Manufacturing complies with ASME B18.6.3 specifications for dimensional accuracy. The product is certified RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring environmental safety and regulatory acceptance for international industrial markets.
