HappiJac Single 4220 Acme Screw Jack #736514

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Replace the jack leg on your HappiJac® truck camper jack system with an exact-match part!

Quick Facts

  • 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

HappiJac® Truck Camper Jack Systems

When it comes to replacement parts for you HappiJac® truck camper jack system, Lippert™ has you covered. Our exact-match screw jacks will help you get your gear up and running like usual. These single Acme screw jacks are durably designed with a zinc-plated and powder-coated outer tubing that resistant to corrosion. Choose from two sizing options to find the screw jack that matches your truck camper's jack system.

What's Included:

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.

Parts You Can Trust.

Our team at Lippert knows that having broken, worn, or malfunctioning RV or camper equipment can put a damper on even the greatest weekends of camping. That’s why we’re committed to providing our customers with the replacement parts and equipment needed to get your RV off the sidelines and back into the great outdoors.


  • 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
More Information
SKU 736514
Brand HappiJac®
Quantity In Package 1
What's Included Screw Jack (1)
Country of Origin USA
Warranty Term 1 Year
Unit of Measure EA
UPC 848150058843
Supersedes SKU 308169,720381

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