S-90585A228 8-32 x 1/2" ASME B18.3 Stainless Steel Hex Drive Flat Head Screws
Stainless Steel Hex Drive 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 316 stainless steel and passivated finish, ideal for harsh chemical and marine environments
- High mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for reliable load-bearing performance
- Precision thread engagement ensured by Class 3A fit and UNC coarse threading, reducing cross-threading risks
- Flush mounting capability with standard 82° countersink angle and flat head design for seamless surface integration
- Enhanced drive stability through hex drive (3/32") design, preventing cam-out during high-torque installation
- Full-length threading providing consistent grip across the entire 1/2" length for uniform clamping force
- Regulatory compliance meeting ASME B18.3, RoHS 3, and REACH standards for global industrial applications
Professional Applications & Engineering Value
These 8-32 UNC flat head screws in 316 stainless steel address critical challenges in chemical processing, marine hardware, and food equipment where corrosion resistance and mechanical integrity are paramount. The passivated finish enhances surface durability against chlorides and acidic environments, while the Class 3A thread fit maintains precise tolerances in vibration-prone assemblies. The 82° countersink angle and flat head profile enable flush mounting in precision machinery, aerospace components, and electronic enclosures where protrusion-free surfaces are essential. With full threading and coarse thread spacing, these fasteners provide rapid installation and superior pull-out resistance in demanding industrial applications.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 3A thread fit and UNC coarse thread profile. Dimensions include 1/2" length, 0.164" thread diameter, and 0.359" head diameter with -0.048" to 0" tolerance. Features 82° countersink angle and fully threaded design. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for regulated industries and international supply chains.
