S-90854A342 M27 x 120 mm ISO 4014, DIN 931 High-Strength Metric Class 10.9 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional Tensile Strength - With 150,000 psi tensile strength and Class 10.9 rating, these screws provide reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
• Superior Corrosion Resistance - Zinc yellow-chromate plating offers enhanced protection against rust and environmental degradation, extending service life in demanding conditions.
• Optimized Thread Design - Coarse M27 x 3mm thread pitch ensures quick assembly and secure fastening, minimizing installation time while maintaining joint integrity.
• High Material Hardness - Rockwell C32 hardness provides excellent wear resistance and durability, maintaining dimensional stability under repeated loads.
• Precision Manufacturing - Class 6h thread fit guarantees consistent threading quality and proper mating with nuts, preventing cross-threading and ensuring reliable connections.
• Industry Standard Compliance - Manufactured to ISO 4014/DIN 931 specifications, ensuring compatibility with existing metric fastener systems and international quality standards.
• Versatile Partial Threading - 60mm minimum thread length on 120mm screws allows for both threaded engagement and smooth shank applications, providing flexibility in various assembly scenarios.

Professional Applications & Engineering Value

These M27 hex head screws deliver critical engineering solutions for heavy-duty industrial applications where high tensile strength and corrosion resistance are paramount. The Class 10.9 steel construction with Rockwell C32 hardness ensures reliable performance in structural steel connections, machinery assembly, and construction projects subject to dynamic loads and vibration. The zinc yellow-chromate plating provides superior protection against moisture and chemical exposure, making these metric bolts ideal for outdoor equipment, manufacturing facilities, and marine environments. The external hex drive design facilitates easy installation with standard tools, while the coarse thread pitch ensures rapid assembly in time-sensitive industrial operations. These partially threaded screws offer the dual advantage of threaded engagement for secure fastening combined with an unthreaded shank for shear resistance, making them particularly valuable in structural applications where both clamping force and alignment are critical.

Specification Summary & Compliance

This hex head screw features precise Class 6h thread fit tolerance according to metric standards, ensuring proper engagement with mating components. The fastener complies with ISO 4014/DIN 931 specifications for dimensional accuracy and mechanical properties. Manufacturing follows international quality standards for metric thread geometry with M27 diameter and 3mm pitch. The product meets industry requirements for material composition and mechanical performance, with verification of 150,000 psi tensile strength and proper heat treatment to achieve Class 10.9 strength grade. Environmental compliance includes adherence to RoHS and REACH regulations for the zinc yellow-chromate plating process.