High-Tensile Bolt with Nut M8x1 - Part Number: 18030-830

The Bolt with Nut Fastening Set (part number 18030-830, property class 10.9, metric fine pitch M8 × 1, total underhead length L = 30 mm, thread length G = 19 mm, unthreaded shoulder 11 mm, standard requirement 3 bolts per blade) is a precision high-tensile structural fastener assembly engineered for compact and lightweight soil-engaging machinery. Designed to withstand shear loads, tensile forces, and persistent high-frequency vibrations across walk-behind tillers, light cultivators, and inter-row weeding equipment.

Key Features & Benefits

• High-Tensile Property Class 10.9: Quenched and tempered from alloy steel, delivering an ultimate nominal tensile strength of 1000 N/mm² and yield point of 900 N/mm² to prevent bolt elongation, shear deformation, and fatigue fractures during stone impacts.
• Metric Fine Thread Pitch (M8 × 1): The 1 mm fine thread pitch provides superior resistance against vibrational loosening compared to standard coarse pitch (M8x1.25), ensuring precise torque setting and reliable preload retention at high rotor speeds.
• Precision 11 mm Unthreaded Shoulder: Ensures that the critical shear interface between the tine shank and rotor holder seats squarely on the solid, unthreaded shank body, preventing notch stress on threads and eliminating mounting hole elongation.
• Optimized Three-Bolt Securing Setup: Supplied complete with a dedicated structural nut suited for property class 10.9 torque specifications, tailored for implements utilizing triple-bolt securing configurations (3 sets per blade) for balanced load distribution.

Technical Specifications

Typical Application Scopes

Installation Technical Note: As a property class 10.9 structural fastener with M8x1 fine pitch, tighten using a calibrated torque wrench (recommended dry torque: approximately 35 – 40 Nm, unless otherwise indicated by the implement OEM). Check hardware torque after the initial hour of field operation.