S-91781A720 1/2"-13 x 2" ASME B18.6.3 Stainless Steel Slotted Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments
• Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B80 hardness for reliable heavy-duty fastening
• Precise thread engagement through Class 2A UNC coarse threading ensures secure installation and vibration resistance
• Optimized flush mounting with standard 82° countersink angle and flat head design for seamless surface integration
• Full-length threading provides maximum grip strength across the entire 2" length for superior load distribution
• Industry-standard compliance with ASME B18.6.3 specifications guarantees dimensional accuracy and interchangeability
• Environmental regulation adherence through RoHS 3 and REACH compliance for safe, sustainable manufacturing

Professional Applications & Engineering Value

These 18-8 stainless steel flat head screws deliver critical performance advantages in demanding industrial settings where corrosion resistance and structural integrity are paramount. The combination of 80,000 psi tensile strength and Rockwell B80 hardness ensures reliable fastening in high-stress applications, while the passivated finish significantly enhances protection against chemical exposure and environmental degradation. The UNC coarse threading with Class 2A fit provides excellent engagement in various materials, reducing installation time and preventing cross-threading issues. The flat head design with 82° countersink angle creates flush surfaces in machinery, equipment assemblies, and structural components where protrusions are unacceptable. These fully threaded screws are particularly valuable in manufacturing, construction, and marine applications where consistent clamping force and long-term reliability are essential.

Specification Summary & Compliance

Manufactured to exact ASME B18.6.3 specifications with Class 2A thread fit tolerance for precision dimensional control. Features UNC 1/2"-13 coarse threads with right-hand orientation and standard flat head profile. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe usage across global markets. The 18-8 stainless steel composition combined with passivated finish provides verified corrosion resistance properties for extended service life.