S-92800A285 5/8"-18 x 4 1/2" 18-8 Stainless Steel Hex Head Screws
18-8 Stainless Steel Hex 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, ideal for harsh industrial environments
- Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B70 hardness for heavy-duty applications
- Precise thread engagement with Class 2A fit and UNF fine threads ensuring reliable, vibration-resistant connections
- Optimized load distribution through partially threaded design with 1½" minimum thread length
- Easy installation and removal with standard external hex drive and 15/16" head width for common tools
- Regulatory compliance assurance meeting RoHS 3 and REACH standards for global industrial use
- Right-hand thread direction providing standard, intuitive fastening operation
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these 5/8"-18 UNF hex head screws deliver critical performance where corrosion resistance and structural integrity are paramount. The 18-8 stainless steel composition provides excellent protection against rust and chemical exposure in marine, chemical processing, and outdoor applications. The UNF fine thread configuration offers superior resistance to vibration loosening compared to coarse threads, while the Class 2A thread fit ensures consistent engagement without binding. The partially threaded design concentrates the fastener's clamping force precisely where needed, making these hex head screws ideal for machinery assembly, structural frameworks, and heavy equipment where precise preload control is essential. The combination of 80,000 psi tensile strength and Rockwell B70 hardness provides reliable performance under dynamic loads and extreme conditions.
Specification Summary & Compliance
This 4½" hex head screw features precise Class 2A thread fit per UNF standards with 5/8"-18 fine threading and 1½" minimum thread length. Manufactured from 18-8 stainless steel with Rockwell B70 hardness and 80,000 psi tensile strength. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations for environmental and safety standards in industrial applications.
