Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of the U-Box Rear Door Hinge Mounted Flag and Antenna Holder Kit. Designed for Jeep Wrangler JL and JL Unlimited models from 2018 to 2022, this kit allows for secure mounting of a flag pole or an antenna on the vehicle's rear door hinges without requiring drilling or modifications.
Package Contents
Please verify that all components are present before beginning installation.
- 1x U-Box Rear Door Hinge Mounted Holder
- 2x M10*40 Bolts
- Necessary washers and nuts (not included in product details, but typically part of such kits)
Image: Kit components, showing the main holder and two M10*40 bolts.
Compatibility
This U-Box holder kit is compatible with the following vehicle models:
- Jeep Wrangler JL (2018, 2019, 2020, 2021, 2022)
- Jeep Wrangler JL Unlimited (2018, 2019, 2020, 2021, 2022)
Installation Instructions
The installation process is designed to be straightforward and typically takes about 10-15 minutes. No drilling or permanent modifications are required.
Tools Required:
- Wrench or socket set (appropriate size for M10 bolts)
Step-by-Step Guide:
Identify Mounting Location: The holder mounts to the rear door hinges of your Jeep Wrangler JL. Locate the two bolts on the upper part of the rear door hinge.
Image: The holder mounted on the rear door hinge, showing the bolt locations.
Remove Hinge Bolts: Carefully remove the two existing bolts from the rear door hinge using the appropriate wrench or socket. Keep these bolts safe in case you need them later.
Position the Holder: Align the U-Box holder with the bolt holes on the rear door hinge. Ensure the holder is oriented correctly, with the flag/antenna receiving tube facing upwards.
Image: Detailed view of the holder's structure and mounting brackets.
Secure the Holder: Insert the provided M10*40 bolts through the holder's mounting points and into the hinge bolt holes. Tighten the bolts securely. Do not overtighten.
Final Check: Ensure the holder is firmly attached and does not wobble. The installation is now complete.
Operating Instructions
This holder is designed to securely mount a flag pole or an antenna.
Insert Flag Pole/Antenna: Insert your flag pole (up to 1.1 inches in diameter) or antenna into the receiving tube of the holder.
Image: The holder with an antenna and flag pole in place.
Secure with Thumb Screw: Tighten the adjustable thumb screw located on the side of the holder to firmly secure the flag pole or antenna in place. Ensure it is snug to prevent movement during vehicle operation.
Image: Detail of the adjustable thumb screw for securing the pole.
Verify Stability: Before driving, gently tug on the flag pole or antenna to confirm it is securely held and will not slip or detach.
Image: The holder in use with a flag on a Jeep Wrangler JL.
Maintenance
Regular maintenance will help prolong the life and appearance of your U-Box holder.
- Cleaning: Clean the holder periodically with mild soap and water to remove dirt and road grime. Rinse thoroughly and dry.
- Inspection: Regularly inspect all bolts and the thumb screw for tightness. Retighten if necessary.
- Corrosion Prevention: While made of aluminum alloy, the bolts may be susceptible to rust over time, especially in wet conditions. Consider applying a rust-inhibiting spray or grease to the bolts to prevent corrosion.
Troubleshooting
- Issue: Flag pole or antenna slips down.
- Solution: Ensure the thumb screw is tightened sufficiently. The holder is designed for poles up to 1.1 inches in diameter; poles smaller than this may require additional shimming for a secure fit. Verify the pole is inserted fully.
- Issue: Bolts are rusting.
- Solution: This can occur due to exposure to moisture. Apply a rust-inhibiting product to the bolts. For severe rust, consider replacing the bolts with stainless steel hardware.
- Issue: Holder feels loose after installation.
- Solution: Recheck the tightness of the M10*40 mounting bolts. Ensure they are securely fastened to the vehicle's hinge. If the issue persists, verify correct installation steps were followed.
Specifications
| Brand | U-Box |
| Model Number | SHM31819 |
| Material | Aluminum Alloy |
| Color | Black |
| Max Pole Diameter | 1.1 inches (2.8 cm) |
| Installation Type | Bolt-on, Rear Door Hinge Mount |
| Compatibility | Jeep Wrangler JL / JL Unlimited (2018-2022) |
Warranty Information
Warranty information for this product is not explicitly provided in the available product details. Please refer to the retailer's return policy or contact U-Box directly for specific warranty terms.
Customer Support
For further assistance, technical support, or inquiries regarding this product, please contact the retailer where the product was purchased. You may also visit the official U-Box website for general product information.
