Product Description
OEM Jam Nut 220019306 for electric lift trucks. Features 5/8-18 UNF thread, SAE Grade 5 medium carbon steel, phosphate coated, and direct replacement for Raymond 750-446. Designed for critical retention applications in industrial lift truck assemblies.
Specifications
Dimensional
| Thread Pitch | 18 TPI (threads per inch) |
Material
| Material Specification | Medium carbon steel |
| Steel Grade | SAE Grade 5 |
| Hardness | Rockwell C25–C34 |
| Finish | Phosphate coated |
Part Numbers
| OEM Part Number | 220019306 |
| Manufacturer Part Number | 220019306 |
| Cross-Reference Part Numbers | 750-446 (Raymond), Replaces Raymond 750-446 |
Frequently Asked Questions
Q: What electric lift truck equipment does OEM jam nut 220019306 fit?
A: Jam nut 220019306 is an OEM replacement for Raymond electric lift trucks, specifically designed as a direct replacement for Raymond part number 750-446. It is also compatible with other electric pallet jack and reach truck models from Crown, Toyota, Jungheinrich, and similar manufacturers that use 5/8-18 UNF threads. Verify thread pitch and size on your equipment before ordering.
Q: What are the thread specifications for jam nut 220019306?
A: This jam nut features a 5/8-18 UNF (Unified National Fine) thread pitch. The 5/8 inch diameter with 18 threads per inch makes this nut suitable for precise fastening on electrical and hydraulic assemblies where vibration retention is critical. UNF threads provide superior holding power compared to coarse UNC threads in dynamic environments.
Q: What material and hardness specifications does jam nut 220019306 meet?
A: Jam nut 220019306 is manufactured from medium carbon steel meeting SAE Grade 5 specifications. It features a phosphate coating for corrosion protection and hardness rated at Rockwell C25 to C34, which provides excellent strength and vibration resistance. SAE Grade 5 ensures reliable performance in critical retention applications found in industrial lift truck assemblies.
Q: Why is jam nut 220019306 better for vibration-prone applications?
A: The 18 TPI (threads per inch) fine thread pitch creates more engaged threads per unit length compared to coarse pitch fasteners, resulting in greater clamp load and vibration resistance. The SAE Grade 5 hardness specification and phosphate coating prevent loosening under the constant vibration typical of electric lift truck operation. This design is specifically engineered for fastening critical assemblies where joint retention is essential.
Q: Is jam nut 220019306 a direct replacement for Raymond 750-446?
A: Yes. Jam nut 220019306 is confirmed as a direct OEM replacement for Raymond part number 750-446. It meets identical thread, material, hardness, and coating specifications. This part is also referred to as the Raymond 750-446 equivalent and is suitable for retrofitting or repair of Raymond electric pallet jacks and reach trucks.