YNF17708 12mm Spline Bolt M12-40(51.5) Hex Socket Bolt

The YNF17708 12mm Spline Bolt is a precision-engineered fastener designed for construction machinery, excavators, and industrial equipment. With a 12mm spline head, M12 thread, and internal hex drive, this bolt provides secure fastening, high torque transmission, and long-lasting durability under heavy-duty working conditions.

• 12mm spline head with internal hex (Allen / Hex Socket) for stable tightening

• Thread specification: M12 × standard pitch

• Available lengths: 40mm / 51.5mm

• Manufactured from high-strength alloy steel

• Resistant to shear, vibration, and mechanical stress

• Precision-machined for accurate fit and leak-free fastening

• Suitable for hydraulic components, machinery joints, and structural assemblies

• Direct OEM-equivalent replacement bolt

• Excavators and construction machinery

• Hydraulic cylinder mounting points and structural assemblies

• Industrial machinery requiring high-torque fasteners

• Maintenance, repair, and machinery assembly operations

• Thread and size verification before shipment

• OEM matching based on old sample or part number

• Long-term supply for repair shops and distributors

• Technical guidance for installation

• Individually packed in anti-rust, moisture-proof bags

• Export-standard cartons for safe transport

• Optional neutral or YNF-branded packaging

• Supports mixed shipments with other parts

Q1: Can this bolt replace the OEM part directly?
A: Yes, it is produced to OEM-equivalent standards.

Q2: Is the bolt heat-treated?
A: Yes, all spline bolts are heat-treated for strength and durability.

Q3: Can I order mixed lengths in one shipment?
A: Yes, mixed lengths (40mm & 51.5mm) are supported.