Looking for Replacement Hardware for a Reese Pro Series Weight Distribution Hitch Model 49903

Updated 06/17/2026 | Published 06/15/2026

Question:

Im looking for replacement bolts for a pro series weight distribution hitch model 49903. The bolts are listed as ¾”-10 X 4 ½”.

asked by: Mike H

Expert Reply:

Thanks for reaching out Mike, happy to help!

For the Reese Pro Series 49903 weight distribution hitch, the head to shank mounting hardware is listed in the installation manual as:

(2) 3/4"-10 x 4-1/2" bolts
(2) 3/4"-10 nuts
(2) 3/4" conical washers

Unfortunately, Reese does not offer those bolts as a separate replacement kit anymore. If your existing hardware is damaged or missing, you can replace it with Grade 5 or Grade 8 3/4"-10 x 4-1/2" hex bolts, along with matching 3/4"-10 nuts and conical washers. When installed, the manual specifies tightening the bolts to 260 ft lbs of torque.

What model of trailer do you use with the Reese Pro Series?

expert reply by: James D