Extra High-Tensile Bolt with Nut M16x1.5 - Part Number: 18030-1665

The Bolt with Nut Assembly (part number 18030-1665, property class 12.9, fine metric thread M16 × 1.5, total shank length L = 65 mm, threaded length G = 39 mm) is a heavy-duty structural fastener engineered for extreme tensile loads, shear forces, and severe mechanical vibration. Designed primarily for ground engaging implements, rotary tiller blades, flail mower hammers, and agricultural machinery rotor assemblies.

Key Features & Benefits

• Maximum Property Class 12.9: Manufactured from quenched and tempered alloy steel, delivering a nominal tensile strength of 1200 N/mm² and yield strength of 1080 N/mm² to prevent bolt elongation, shear failure, and shock cracking.
• Fine Metric Pitch (M16 × 1.5): The 1.5 mm fine pitch offers enhanced self-locking capabilities against persistent working vibration, allowing for more precise clamping preload control compared to standard coarse threads.
• Dedicated Unthreaded Shoulder: A precision unthreaded shank section (approx. 26 mm) provides a robust bearing surface inside the blade and rotor flange holes, preventing localized shear fatigue and hole elongation.
• Supplied as a Complete Set: Matched with a heavy-duty high-tensile nut designed to maintain clamping torque integrity under abrasive and rocky soil conditions.

Technical Specifications

Typical Application Scopes

Installation Technical Note: Due to the grade 12.9 metallurgy and M16x1.5 fine thread pitch, always utilize a calibrated torque wrench during installation (recommended dry tightening torque: approx. 300 - 340 Nm, unless otherwise indicated by the implement OEM). Confirm that the unthreaded shank seats cleanly across the shear zone of the blade and holder.