S-91781A537 1/4"-20 x 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 with 18-8 stainless steel construction and passivated finish for extended service life in harsh environments
- High tensile strength of 80,000 psi ensures reliable fastening under substantial mechanical loads
- Precise Class 2A thread fit provides smooth installation and consistent engagement in UNC coarse threaded applications
- Standard 82° countersink angle allows for flush mounting in precision-machined components
- Rockwell B80 hardness rating delivers excellent wear resistance and durability
- Full threading along entire 1/2" length maximizes grip strength and load distribution
- Comprehensive compliance with ASME B18.6.3, RoHS 3, and REACH ensures regulatory acceptance
Professional Applications & Engineering Value
These flat head slotted screws provide critical solutions for industrial applications requiring flush surface mounting and reliable performance. The combination of 18-8 stainless steel material and passivated finish creates exceptional corrosion resistance, making them ideal for machinery, electrical enclosures, and marine equipment where environmental factors degrade inferior fasteners. The UNC coarse threading with Class 2A fit ensures quick installation and secure fastening in various materials, while the 82° countersink angle maintains proper seating in precision-machined components. With 80,000 psi tensile strength and Rockwell B80 hardness, these fully threaded screws withstand vibration and mechanical stress in demanding industrial environments.
Specification Summary & Compliance
This 1/4"-20 x 1/2" flat head slotted screw features precision UNC coarse threading with Class 2A thread fit tolerance for consistent performance. Manufactured to ASME B18.6.3 specifications with 82° countersink angle and fully threaded design. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across industrial sectors.
