Bolt with Nut M12x1.25 L 40 mm Grade 12.9 for Agricultural Machinery - 18030-1240

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Bolt with Nut M12x1.25 L 40 mm Grade 12.9 for Agricultural Machinery - 18030-1240

Bolt and nut assembly part number 18030-1240 designed for secure blade and component fastening on agricultural equipment (standard requirement: 3 per blade). Made from high-tensile grade 12.9 steel featuring an M12 x 1.25 fine pitch thread, total length L 40 mm, and thread length G 27 mm to withstand heavy shear stress and operational vibrations.

Maximum Property Class 12.9
Metric Fine Thread Pitch (M12 × 1.25)
Precision 13 mm Unthreaded Shoulder

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Description

Key features

Maximum Property Class 12.9Quenched and tempered from high-performance alloy steel, delivering a nominal ultimate tensile strength of 1200 N/mm² and yield point of 1080 N/mm² to prevent bolt elongation, shear deformation, and brittle fractures during rocky soil impact.

Metric Fine Thread Pitch (M12 × 1.25)The fine 1.25 mm pitch provides superior self-locking resistance against persistent working vibrations compared to coarse threads, ensuring consistent preload retention and clamping force.

Precision 13 mm Unthreaded ShoulderKeeps the primary shear boundary between the blade and mounting flange completely on the solid unthreaded body, eliminating notch stress concentrations on the thread and preventing mounting hole elongation.

Three-Bolt Tine Mount OptimizationSupplied complete with a dedicated structural nut suited for property class 12.9 torque specifications, tailored for implements utilizing triple-bolt securing configurations (3 sets per blade) for maximum torsional rigidity.

Specifications

Product Code	18030-1240
Component Type	Partially threaded hex head bolt with matched nut set
Property Class / Grade	12.9 (Quenched and tempered alloy steel)
Thread Size and Pitch	M12 × 1.25 (Metric fine pitch)
Total Underhead Length (L)	40 mm
Threaded Length (G)	27 mm
Unthreaded Shank Length	13 mm
Quantity per Tiller Blade	3 sets per blade / tine