S-91781A634 3/8"-16 x 2 1/2" ASME B18.6.3 Stainless Steel Slotted Flat Head Screws
Stainless Steel Slotted 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 from 18-8 stainless steel and passivated finish, ideal for harsh environments
- Exceptional tensile strength of 80,000 psi and Rockwell B80 hardness for reliable load-bearing performance
- Precise Class 2A thread fit ensures smooth assembly and secure fastening in industrial applications
- Standard 82° countersink angle allows for flush mounting, reducing snag hazards and improving aesthetics
- Coarse UNC threading provides faster installation and better performance in softer materials
- Comprehensive compliance with ASME B18.6.3, RoHS 3, and REACH standards for guaranteed quality and safety
- Versatile partial threading offers optimal grip length while maintaining unthreaded shank strength
Professional Applications & Engineering Value
These 3/8"-16 UNC flat head screws deliver critical engineering solutions where flush mounting and corrosion resistance are paramount. The 18-8 stainless steel construction combined with passivated finish provides exceptional protection against rust and chemical exposure in marine, food processing, and outdoor applications. The coarse thread design ensures rapid installation and superior holding power in wood, plastic, and soft metals, while the partially threaded configuration concentrates gripping force where needed most. With 80,000 psi tensile strength, these flat head screws maintain integrity under vibration and dynamic loads, making them ideal for machinery, structural assemblies, and equipment requiring reliable, long-term fastening solutions.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 2A thread fit tolerance and UNC coarse thread spacing. Fully compliant with ASME B18.6.3 specifications for dimensional accuracy and performance. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors. Features standard 82° countersink angle and slotted drive configuration for compatibility with common installation tools.
