WOD 1.75" Tube Disconnect Flange Set
WA121005
The Wide Open Design 1.75" Tube Disconnect Flange Set allows fabricators to build removable, bolt-together sections into tube chassis and roll cage structures. These weld-on flanges are ideal for engine cages, cooler racks, spare tire carriers, rear chassis sections, shock bars, and other tube assemblies that need to be removed for service or access.
Each flange is precision laser cut from 1/4" high-strength steel for consistent alignment, clean weld surfaces, and repeatable reassembly. Designed specifically for 1.75" OD tubing, this set creates a strong modular connection without permanently tying the surrounding structure together.
Includes:
- (2) 1.75" Tube Disconnect Flanges
- Enough components for one complete bolt-together connection
Specifications
| Specification | Details |
|---|---|
| Product Type | Weld-On Tube Disconnect Flange Set |
| Tube Compatibility | 1.75" OD Tubing |
| Material | 1/4" High-Strength Plate Steel |
| Overall Length | 4.125" |
| Overall Height | 2.125" |
| Bolt Hole Diameter | 3/8" |
| Manufacturing Method | Precision Laser Cut |
| Installation Type | Weld-On / Bolt-Together |
| Quantity | 2 Flanges per Set |
| Part Number | F021005 |
| Country of Origin | Made in the USA |
Fitment
| Application | Common Use |
|---|---|
| Engine Cage | Creates removable front tube sections for engine service |
| Rear Chassis Section | Allows rear structure removal for drivetrain or suspension access |
| Cooler or Radiator Rack | Provides a serviceable bolt-on mounting section |
| Spare Tire Carrier | Allows removal of the carrier without cutting tube work |
| Shock or Cross Bar | Creates removable support tubes where service access is required |
Fitment Notes:
- Designed specifically for 1.75" OD steel tubing.
- Universal fitment for custom chassis, roll cages, race vehicles, and off-road fabrication projects.
- Both flanges must be aligned and welded square to prevent bolt binding during installation or removal.
- Mounting bolts, nuts, and washers are not listed as included and should be selected for the application.
- Tube ends should be properly notched and fitted before welding.
- Verify surrounding tube structure remains properly supported when the removable section is taken out.
- Final strength depends on tube material, wall thickness, weld quality, bolt grade, and overall chassis design.
- Any use in a primary roll cage or occupant-protection structure should be reviewed by a qualified fabricator and checked against the applicable sanctioning-body rules.
FAQ
What are tube disconnect flanges used for?
Tube disconnect flanges create removable sections in a welded tube structure. They are commonly used where engine, transmission, cooling-system, suspension, or rear-chassis access would otherwise require cutting welded tube work apart.
Will these flanges fit 1.5" tubing?
No. This set is designed for 1.75" OD tubing. Use the dedicated 1.5" Tube Disconnect Flange Set for 1.5" tubing.
Are mounting bolts included?
The supplied listing identifies two flanges as included but does not list mounting hardware. Select properly graded 3/8" hardware based on the load, tube structure, and intended use.
Can these be used in a roll cage?
They can be incorporated into custom tube structures, but removable joints in primary occupant-protection areas may be restricted by racing or safety regulations. Confirm the design with a qualified chassis fabricator and the applicable rulebook before installation.
How do I keep the flanges aligned while welding?
Bolt the two flanges together with spacers or the intended hardware, fixture the tubes at the required angle, and tack-weld both sides before final welding. Allow the assembly to cool and verify the bolts remove and reinstall freely before completing the build.
