S-91280A161 M5 x 18 mm ASME B18.2.3.1M, ISO 4017, DIN 933 Medium-Strength Metric Class 8.8 Steel Hex Head Screws
Medium-Strength Metric Class 8.8 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 zinc plating that protects against rust and extends service life in harsh environments
- High-strength performance with Class 8.8 rating and 110,000 psi tensile strength for reliable load-bearing in demanding applications
- Excellent thread engagement thanks to coarse 0.8mm pitch design that provides faster assembly and superior vibration resistance
- Optimized installation efficiency with external hex head design allowing for high torque application and secure fastening
- Precision manufacturing with Class 6h thread fit ensuring consistent quality and compatibility with standard metric components
- Full thread coverage along the 18mm length for maximum grip strength and uniform stress distribution
- Industry compliance assurance meeting international standards for quality and environmental regulations
Professional Applications & Engineering Value
These M5 hex head screws deliver exceptional engineering value across industrial applications where vibration resistance and structural integrity are critical. The Class 8.8 steel construction provides reliable strength for machinery assembly, automotive components, and equipment manufacturing, while the coarse thread spacing ensures secure fastening even in materials prone to stripping. The zinc plated finish offers essential corrosion protection for outdoor equipment, electrical enclosures, and manufacturing environments where moisture or chemicals are present. With fully threaded design and external hex drive, these metric fasteners enable quick installation and disassembly while maintaining consistent clamping force, making them ideal for maintenance-heavy applications and production lines where downtime reduction is crucial.
Specification Summary & Compliance
Manufactured to precise Class 6h thread fit tolerance with M5 x 0.8mm coarse thread specifications. Compliant with ASME B18.2.3M, ISO 4017, and DIN 933 standards for dimensional accuracy and performance. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance requirements. Features Rockwell C21 hardness and 110,000 psi tensile strength consistent with Class 8.8 strength grade specifications.
