Bolt On Transition plate

Jack Transition Plate – Converts 7” x 5.5” to 3.5” x 5.5” Bolt Pattern (PFJ-MB-Transition) Adapt Your Trailer to Fit Primary Mover Bolt-On Jacks The Primary Mover Jack Transition Plate (PFJ-MB-Transition) is designed to solve bolt pattern compatibility issues when installing a bolt-on hydraulic jack. This plate allows you to convert a 7” x 5.5” trailer bolt pattern to match the Primary Mover jack bolt pattern of 3.5” x 5.5”, making it easy to install our bolt-on jacks on trailers that would otherwise not be compatible. No cutting, drilling, or fabrication required—just bolt it on and go. How It Works This transition plate installs between your trailer and your jack: Step 1: Bolt the plate to your trailer using the 7” x 5.5” pattern Step 2: Bolt your Primary Mover jack to the plate using the 3.5” x 5.5” pattern This creates a secure mounting system that bridges the gap between different bolt patterns. Key Features Exact Fit Conversion: Converts 7” x 5.5” to 3.5” x 5.5” bolt pattern Perfect for Bolt-On Jacks: Designed specifically for Primary Mover hydraulic jacks Heavy-Duty Steel Construction: Approximately 7/8” thick for maximum strength No Welding Required: Simple bolt-on installation Complete Hardware Included: Bolts, nuts, and lock washers provided Expands Compatibility: Works with trailers that don’t match standard jack patterns Specifications SKU: PFJ-MB-Transition Material: Heavy-duty steel (~7/8” thick) Trailer Bolt Pattern: 7” x 5.5” Jack Bolt Pattern: 3.5” x 5.5” Mounting Style: Bolt-on transition plate For exact dimensions and hole spacing, refer to the technical drawing: :contentReference[oaicite:0]{index=0} Why This Plate Matters Not all trailers use the same jack mounting pattern. Without a transition plate, that often means: Drilling new holes into your trailer frame Welding new brackets Being limited to certain jack options This plate eliminates those issues by allowing you to quickly adapt your trailer to fit a better jack system. What’s Included Transition plate Mounting bolts Nuts and lock washers Note: All Primary Mover bolt-on jacks include hardware for mounting directly to this plate. Recommended Applications Dump trailers Equipment trailers Utility trailers Diamond C and similar trailers Any trailer with a 7” x 5.5” bolt pattern Product Videos & Setup Help Need help confirming fitment or installation? Click here to view jack installation and setup videos (Primary Mover Video Library) Frequently Asked Questions What bolt patterns does this convert? It converts a 7” x 5.5” trailer bolt pattern to the Primary Mover 3.5” x 5.5” jack bolt pattern. Will this work with my trailer? It will work if your trailer uses a 7” x 5.5” bolt pattern. Always verify your measurements before purchasing. Does this require welding? No. This is a fully bolt-on solution. Is hardware included? Yes, mounting hardware is included. Additional hardware is also included with Primary Mover jacks. Can I use this with other jack brands? It may work with other jacks that share the same bolt pattern, but it is specifically designed for Primary Mover bolt-on jacks. Benefits of Choosing Primary Mover Designed for real-world trailer applications Simple solutions to common installation problems Heavy-duty materials built to last Expert support for trailer and hydraulic systems One-year warranty on hydraulic products