High-strength 14mm spline bolt with internal hex, ideal for excavators and heavy machinery requiring secure vibration-resistant fastening.
High-strength 14mm spline bolt with M14-40/54 length options
Internal hex drive ideal for narrow installation spaces
Heat-treated alloy steel ensures high load-bearing capacity
Precision thread (2.0 pitch) for stable locking and anti-vibration performance
Widely used in excavator structures, hydraulic systems, and mechanical assemblies
The YNF03804 14mm spline bolt is a heavy-duty fastener used extensively in excavators, hydraulic mechanisms, and industrial machinery. With an M14 thread, internal hex, and splined shank, this bolt delivers exceptional anti-twist performance and reliable clamping strength in high-vibration environments. It is available in 40mm and 54mm lengths, providing options suited for different structural and hydraulic assembly configurations.
Manufactured from heat-treated alloy steel, the bolt offers excellent resistance to tensile stress, shear force, and continuous impact loads. The precise machining ensures proper fitment, stable locking, and long service life even under harsh working conditions.
Common applications include swing motors, hydraulic valve mounts, gear housings, structural assemblies, and excavator joints. YNF Machinery provides trusted quality and competitive B2B pricing, making this bolt an excellent choice for workshops, equipment fleets, and aftermarket distributors.
| Parameter | Details |
|---|---|
| YNF Part Number | YNF03804 |
| Product Type | Spline Bolt / Internal Hex Screw |
| Diameter | 14mm |
| Thread Size | M14 |
| Length Options | 40mm / 54mm |
| Thread Pitch | 2.0 |
| Drive Type | Internal Hex |
| Material | Heat-treated Alloy Steel |
| Application | Excavators, hydraulics, machinery assemblies |
| Usage | Structural fastening, mounting, mechanical joints |
| Brand | YNF |
| Origin | China |
| MOQ | 1 Piece |
| Shipping | Air, Sea, Express |
| Payment Terms | T/T, PayPal, Western Union |
| Application Area | Description |
|---|---|
| Excavator Structural Fastening | Connects joints, arms, frames, and brackets |
| Hydraulic Component Mounting | Secures valves, pumps, motors, and cylinder bases |
| Gearbox & Mechanical Assembly | Ensures stable locking under vibration |
| Equipment Repair & Maintenance | Ideal for excavator and machinery overhaul |
| Aftermarket Fastener Distribution | Preferred by wholesalers and repair workshops |
Related Products:
12mm Spline Bolt M12
16mm Spline Bolt M16
Heavy-Duty Internal Hex Fasteners
Excavator Structural Bolt Kits
FAQs：
Q: What lengths are available for this bolt?
A: 40mm and 54mm.
Q: Is this bolt suitable for excavators?
A: Yes, it is commonly used in structural and hydraulic assemblies.
Q: What material is it made from?
A: Heat-treated alloy steel for strength and durability.
Q: MOQ?
A: MOQ = 1 piece.
The YNF03804 14mm spline bolt is engineered for high-load, vibration-intensive applications found in excavators and industrial machinery. Its precision splined design and heat-treated alloy steel construction ensure long-lasting, secure fastening performance. YNF Machinery provides reliable quality, competitive wholesale pricing, and global delivery—ideal for maintenance shops, fleet owners, and aftermarket distributors. Contact us today for detailed pricing.
