The YNF03804 14mm Spline Bolt is a precision-engineered fastening component widely used in excavators and construction machinery. Manufactured from high-strength alloy steel, it provides excellent resistance to wear, vibration, and torsional load. The M14-40(54) hex socket design ensures reliable installation and stable performance in demanding working environments.

• 14mm spline bolt for excavator and heavy-equipment applications

• Size: M14-40(54)

• Internal hex (Allen / Hex Socket) design for secure tightening

• High-strength alloy steel with heat-treatment

• Excellent resistance to shear force and vibration

• Precise spline machining ensures a tight and stable fit

• Corrosion-resistant surface finish

• Suitable for OEM replacement and machinery repair

• Excavators, loaders, and construction machinery

• Undercarriage, swing motor, pump housing, and structural assembly positions

• Ideal for equipment requiring high-torque and vibration-resistant spline bolts

• Size and specification confirmation

• OEM matching based on sample or photos

• Long-term supply for wholesalers and repair shops

• Technical guidance for correct installation

• Packed in moisture-proof, anti-rust packaging

• Bulk bags, small boxes, or custom labeling available

• Export-standard carton packaging for mixed shipments

Q1: Can you confirm the size M14-40(54)?
A: Yes. Send a photo or measurement if needed to ensure perfect match.

Q2: Is this bolt heat-treated?
A: Yes, all spline bolts undergo strict heat treatment for strength and durability.

Q3: Can you supply mixed sizes in one shipment?
A: Yes, we can combine multiple bolt types and other excavator parts.