S-90585A075 1/2"-20 x 1" 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 with 316 stainless steel construction and passivated finish, ideal for harsh industrial environments
- Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for heavy-duty applications
- Precision thread engagement with Class 3A fit and UNF fine threads ensuring reliable, vibration-resistant connections
- Optimized flush mounting with standard 82° countersink angle and flat head design for seamless surface integration
- Efficient installation through hex drive (5/16") enabling high-torque application without cam-out risks
- Full-threaded design providing maximum grip length and load distribution across the entire fastener
- Regulatory compliance meeting ASME B18.3 specifications and environmental standards (RoHS 3, REACH)
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these 1/2"-20 UNF flat head screws deliver critical performance advantages in machinery, marine equipment, and chemical processing systems. The 316 stainless steel material provides exceptional resistance to chlorides and corrosive agents, while the passivated finish enhances surface durability. The Class 3A thread fit ensures precise mating with tapped holes, eliminating play in high-vibration environments. The fine UNF threading offers superior clamping force distribution compared to coarse threads, making these hex drive screws ideal for precision assemblies requiring reliable, long-term fastening solutions under substantial mechanical stress.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 3A thread tolerance for precision fit. Features 1/2"-20 UNF fine threads with full threading along the 1" length. The 82° countersink angle conforms to standard flat head profiles. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. All dimensions conform to inch system measurement standards with controlled head diameter tolerance (-0.066" to 0").
