Screw Jack

Technical Product Data Sheet

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The OCM 4x4 Screw Jack or 6x6 Screw Jack are versatile products made from hi-grade steel that will allow you to create an adjustable support of any length with your own 4x4 or 6x6 lumber. Use as structural support in residential, commercial, trench and collapse rescue.


  • Full 6" Adjustment with 1.25" dia. acme threaded screw.
  • Screw Jack is equipped with a safety lock. Tighten safety lock with an Allen Wrench once final adjustment has been made to prevent accidental height adjustment to jack post.
  • Proper bracing required to prevent lateral shifting.
  • Use your own Standard with Dressed 4x4 Lumber (3.5" Sq.), cut square to any length.
OCM Part No. Size Weight Load Capacity specified total shore height,
using Doug Fir Dim. Lumber
SCREWJACK4X4 4 X 4 12 lbs 15,000 lbs at 4 ft. Total Shore Height
SCREWJACK6X6 6 X 6 22 lbs 30,000 lbs at 6 ft. Total Shore Height

OCM Limited Warranty

All recommendations, statements and technical data contained herein are based on tests we believe to be reliable and correct; however, accuracy and completeness of said tests are not guaranteed and are not provided as an express or implied warranty. User shall rely on his or her own information and tests to determine suitability of the product for the intended use and user assumes all risk and liability resulting from his or her use of the product. In the event that a product supplied by OCM, Inc. proves to not meet the OCM, Inc. published dimensional or other specifications of the product, an OCM, Inc. representative will review such product and circumstances to determine whether a replacement is warranted. OCM, Inc.'s and its manufacturer's sole responsibility shall be to replace, at OCM, Inc.'s sole discretion that product or portion of the product which OCM, Inc. deems to be defective, within six months of the delivery of the product. OCM, Inc. disclaims all other warranties or conditions, whether express or implied, including an implied warranties of merchantability or fitness for any particular purpose. In no event shall OCM, Inc. or its parent or affiliated companies be liable for delay caused by defects, for loss of use, or for any indirect, incidental, special, or consequential damages or for any charges or expenses of any nature whatsoever. In no event shall OCM, Inc.'s liability exceed the purchase price paid for the particular affect OCM, Inc. products.

OCM, Inc.

1120 Peterson Road, Grayslake, IL 60030
Toll Free: 866-457-5710 • Phone: 847-462-4258 • FAX: 847-462-4259