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0721 IH-4590

H-4590

U-CHANNEL 

BASE ADAPTER

1-800-295-5510

uline.com

NOTE: For use with H-4588 and H-4589 
rubber sign bases.

ASSEMBLY

1.  Turn the base upside down on a flat work surface so 

the 4¼

"

 diameter hole is facing up.

2.  Use a hammer to pound the adapter into the base 

until it bottoms out on the work surface.  
(See Figure 1)

3.  Turn the base right-side up, and, with your hands 

supporting each side of the base, hit the plate of 
the adapter against the flat work surface. Use the 

weight of the base to drive the adapter completely 
through the hole. (See Figure 2)

NOTE: The adapter plate should be flush 
against the bottom of the base. If needed, 
use a hammer to pound the plate against the 
bottom of the base.

4.  Place the base onto the flat working surface so  

the adapter extension is facing upward. Using two  

1/4 x 20 x 2" bolts, four 1/4" washers, and two 1/4" nuts, 

attach the U-Channel sign post. 

NOTE: Place the washers on each side of the 
U-Channel assembly.

5.  Attach the sign to the U-Channel using the two  

1/4 x 20 x 1½" bolts, four 1/4" washers, and two 1/4" nuts.

NOTE: The sign should be attached to the 

side of the U-Channel providing the greatest 
stability. The sign should touch the wings of the 
U-Channel sign post, not the hump.

TOOLS NEEDED

Hammer

7/16" Socket Wrench

Figure 1

Figure 2

Para Español, vea página 2.

Pour le français, consulter la page 3.

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