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- EXACT-MATCH - The replacement screw jacks are just like your original HappicJac equipment for a seamless installation
- DURABILITY - Outer tube has been zinc-plated and powder-coated for superior corrosion resistance
- STRENGTH - Available with either a 2,220 or 2,800 lb. lift capacity
- PROTECTIVE DESIGN - Wiper at the bottom of the jack helps prevent debris from getting into the jack leg
- EASY UPGRADE - All Happijac jacks have an electrical upgrade option for more efficient operation
The 4220 and 4280 screw jacks boasts square tubing. These replacement jack legs are designed for HappiJac truck camper jack systems, and include an outer tube that has been zinc-plated and then powder-coated for superior corrosion resistance. It also has a wiper at the bottom of the jack to help prevent debris from getting into the jack leg, and a zinc plated inner leg. All Happijac jacks have an electrical upgrade option.
This kit comes with a single screw jack designed for HappiJac truck camper jack systems. This is a replacement jack leg. Please see manufacturer's guide before purchase to ensure compatibility.
For more than 50 years, HappiJac has been producing high quality products for the RV industry. HappiJac conducts extensive research and testing to develop quality products backed by sound engineering. HappiJac leads the industry in fully upgradeable camper jacks, space-efficient room slides and the only camper tie down system that effectively controls camper movement in all directions. From bed lifts and slide-outs to tie downs, jacks and toolboxes, we have the solution for your RV needs.
- Replacement jack leg for HappiJac truck camper system
- Available in two models: 4220 or 4820
- Plated and powder-coated outer tube resists corrosion
- Easy-to- access manual override with full 360-degree cranking
- Efficient, precision CAD design sustains quiet operation
- Upgradeable to electric
- Kit does not include the required HappiJac turnbuckles and stabilizing bar
- Please verify compatibility before purchase
| Width (inches) | 6.5 |
|---|---|
| Height (inches) | 5.5 |
| Length (inches) | 54 |
| Weight (pounds) | 29 |
| Inner leg material | Zinc plated steel |
| Outer tube material | Zinc-plated and powder-coated steel |
| Lift capacity (pounds) | 2220 |
| Dimensional weight (pounds) | 11.63 |
- What is the lift capacity of the happijac single 4220 acme screw jack? The Happijac Single 4220 Acme Screw Jack has a lift capacity of 2,220 lbs.
- Is the happijac single 4220 acme screw jack corrosion resistant? Yes, the outer tube of the jack is zinc-plated and powder-coated for superior corrosion resistance.
- Can this screw jack be upgraded to an electric model? Yes, all Happijac jacks, including the 4220 model, have an electrical upgrade option for more efficient operation.
- Does this kit include the stabilizing bar and turnbuckles needed for installation? No, the kit does not include the required Happijac turnbuckles and stabilizing bar.
- What are the dimensions of the happijac single 4220 acme screw jack? The dimensions are approximately 54 inches in length, 6.5 inches in width, and 5.5 inches in height.
Factory-Fresh OEM Parts — the same brands installed in new RVs straight from Elkhart. Genuine, name-brand components made to order — never generic, never outdated. Sourced directly from the original RV manufacturers for perfect fit and factory-level quality.