S-90585A726 1/2"-13 x 3 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 with 316 stainless steel construction and passivated finish, ideal for harsh chemical and marine environments
- Exceptional mechanical strength delivering 70,000 psi tensile strength and Rockwell B55 hardness for heavy-duty applications
- Precision thread engagement with Class 3A thread fit ensuring reliable, vibration-resistant connections in critical assemblies
- Optimal flush mounting with standard 82° countersink angle flat head design for smooth surface finishing
- Enhanced installation efficiency through 5/16" hex drive and fully threaded UNC coarse spacing for rapid assembly
- Regulatory compliance assurance meeting ASME B18.3 specifications while being RoHS 3 and REACH compliant
- Dimensional consistency with controlled head diameter tolerance (-0.066" to 0") for uniform performance across production runs
Professional Applications & Engineering Value
Engineered for demanding industrial environments, these 316 stainless steel flat head screws provide critical protection against corrosive elements in chemical processing, marine hardware, and food processing equipment. The combination of Class 3A thread fit and UNC coarse threading ensures secure fastening in high-vibration applications while the passivated finish enhances surface durability. The fully threaded design offers maximum grip length for structural connections, and the 82° countersink angle creates seamless flush mounting in precision machinery. These flat head screws deliver reliable performance where corrosion resistance and mechanical integrity are paramount, reducing maintenance frequency and lifecycle costs in critical installations.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 3A thread fit precision and UNC coarse thread spacing. Features include 1/2"-13 thread size, 3-1/2" length, and full threading. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Mechanical properties include 70,000 psi tensile strength and Rockwell B55 hardness rating.
