Product Description
OEM Hyster HY 220279 screw for electric lift truck assemblies. Features 1/2"-13 UNC threads
Specifications
Dimensional Specifications
| Pitch | 13 threads per inch |
Material & Construction
| Hardness | Rockwell C33-C39 |
| Thread Fit | Class 2A |
| Finish | Phosphate and oil-coated |
Part Numbers
| OEM Part Number | HY 220279 |
Frequently Asked Questions
Q: What are the thread specifications for HY 220279?
A: The HY 220279 features 1/2 inch-13 UNC (Unified National Coarse) threads with Class 2A fit, 13 threads per inch, and a phosphate and oil-coated finish. This is a standard US Unified thread specification for Hyster electric lift truck assemblies.
Q: What is the hardness specification for HY 220279?
A: HY 220279 is hardened to Rockwell C33-C39. This hardness range indicates an alloy steel fastener designed for structural and load-bearing applications on electric lift truck assemblies where moderate to high stress is present.
Q: What does the phosphate and oil coating do?
A: The phosphate and oil coating provides corrosion protection and reduces friction during tightening. This finish is standard on OEM fasteners for lift trucks and helps prevent rust in indoor and light outdoor environments typical of warehouse and facility operations.
Q: Is HY 220279 suitable for wet or outdoor storage areas?
A: The phosphate and oil finish provides moderate corrosion resistance for typical warehouse environments. For extended wet storage, cold storage, or outdoor exposure, verify with OEM specifications or consider alternative coatings. Periodic inspection is recommended in high-moisture conditions.
Q: Can HY 220279 be interchanged with other 1/2 inch-13 fasteners?
A: Not without verification. While HY 220279 uses a standard UNC thread, the specific hardness, material grade, and coating are OEM-specified for your Hyster equipment. Using non-OEM fasteners of different material grades or coatings may cause assembly problems or fastener failure.