S-91280A858 M16 x 120 mm ISO 4014, DIN 931, SAE J1199, ISO 898 Medium-Strength Metric Class 8.8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 110,000 psi for reliable performance in high-stress industrial applications
• Superior corrosion resistance with zinc plating that protects against rust and extends service life
• Class 8.8 strength grade ensures consistent mechanical properties and load-bearing capacity
• Precision coarse threading (M16x2 mm) enables faster assembly and reduced cross-threading risks
• Partially threaded design provides optimal grip length while minimizing weight and material usage
• External hex drive compatibility allows for standard tooling and straightforward installation
• Rockwell C21 hardness maintains structural integrity under repeated stress and vibration

Professional Applications & Engineering Value

Engineered for demanding mechanical assemblies and heavy-duty construction applications, these Class 8.8 metric hex head screws deliver exceptional reliability where failure is not an option. The zinc plated steel construction provides critical corrosion protection in harsh environments, while the M16 coarse thread configuration ensures rapid installation without compromising joint security. With partial threading optimizing clamp load distribution and 38mm minimum thread engagement, these fasteners solve common challenges in structural steel connections, machinery framing, and industrial equipment assembly where vibration resistance and long-term durability are paramount.

Specification Summary & Compliance

Manufactured to exacting Class 6h thread fit tolerance with right-hand coarse threading (M16x2 mm). Fully compliant with ISO 4014, DIN 931, SAE J1199, and ISO 898 manufacturing specifications. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for sustainable procurement. The 120mm length with 38mm minimum thread length provides dimensional consistency across production batches.