S-91781A593 5/16"-18 x 2 1/2" ASME B18.6.3 Stainless Steel Slotted Flat Head Screws
Stainless Steel Slotted Flat Head Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh environments
- Exceptional mechanical strength offering 80,000 psi tensile strength and Rockwell B80 hardness for heavy-duty applications
- Reliable fastening performance with Class 2A thread fit and UNC coarse threads ensuring secure connections
- Optimized flush mounting featuring a standard flat head with 82° countersink angle for seamless surface integration
- Enhanced installation control through partial threading and slotted drive for precise torque application
- Industry-standard compliance meeting ASME B18.6.3 specifications for consistent quality and interchangeability
- Environmental responsibility with RoHS 3 and REACH compliance for safe, sustainable industrial use
Professional Applications & Engineering Value
These 5/16"-18 UNC flat head slotted screws deliver critical engineering solutions where corrosion resistance, flush surface requirements, and high tensile strength are paramount. The 18-8 stainless steel material combined with passivated finish provides exceptional protection against oxidation and chemical exposure in marine, food processing, and outdoor applications. The partial threading design prevents thread interference in deep holes while maintaining maximum grip length, and the 82° countersink angle ensures perfect flush mounting in machinery, structural assemblies, and precision equipment. With coarse UNC threads and Class 2A thread fit, these screws offer rapid installation and vibration resistance in heavy industrial environments where reliability cannot be compromised.
Specification Summary & Compliance
This flat head screw features precise Class 2A thread fit with 5/16"-18 UNC coarse threads and a minimum thread length of 1-1/2". Manufacturing adheres to ASME B18.6.3 specifications for dimensional accuracy and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe usage across global industrial markets.
