S-91180A924 M20 x 50 mm ISO 8676, DIN 961 Medium-Strength Metric Class 8.8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior load-bearing capacity with 110,000 PSI tensile strength and Class 8.8 grade, ensuring reliable performance in high-stress industrial environments.
• Enhanced corrosion resistance from zinc plating, prolonging service life in humid or outdoor applications without frequent replacements.
• Precise extra fine thread (M20x1.5mm) with Class 6h fit, delivering secure fastening and vibration resistance in machinery and structural assemblies.
• Full threading along the 50mm length for uniform stress distribution and flexibility in adjusting grip depth across varied material thicknesses.
• External hex drive and hex head design enabling easy installation with standard tools, reducing assembly time and labor costs.
• Certified compliance with ISO 8676 (DIN 961), ensuring interchangeability and quality consistency in global engineering projects.
• Rockwell C21 hardness provides excellent wear resistance, maintaining thread integrity under repeated use and mechanical shocks.

Professional Applications & Engineering Value

Engineered for demanding industrial and construction applications, this M20 hex head screw combines high-strength steel and zinc plating to address common challenges like corrosion, vibration loosening, and heavy load failure. The extra fine metric thread (1.5mm pitch) ensures tight clamping force in precision equipment, automotive frames, and structural steel connections, minimizing the risk of joint slippage. With full threading and Class 8.8 strength, it supports uniform stress dispersal in thick assemblies, reducing point failures. The external hex drive facilitates quick installation with common wrenches, streamlining maintenance in confined spaces. Ideal for machinery, infrastructure, and metal fabrication, this fully threaded metric fastener offers long-term reliability under dynamic or static loads.

Specification Summary & Compliance

This M20x1.5x50mm hex head screw adheres to ISO 8676 (DIN 961) standards for dimensional accuracy and thread profile, with a Class 6h thread fit ensuring precise engagement. Manufactured from steel with Rockwell C21 hardness and 110,000 PSI tensile strength, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance for environmental safety. The right-hand thread direction and fully threaded design guarantee consistent performance in metric-based systems, backed by rigorous quality controls.