Parts Needed To Connect Rhino Rack HD Crossbars To Legs

Updated 09/01/2025 | Published 08/17/2025

Products Featured in This Question

Rhino-Rack Heavy-Duty Roof Rack for Camper Shells - Track Mount - Black - 65" Bars

(107)

$799.96

Replacement M6 Galvanized Channel Nuts 4 Pack

(1)

$18.00

Replacement M6 x 20 mm Socket Head Cap Screw for Rhino-Rack Accessories - Qty 1

(5)

$2.46

Question:

I need a third rail for this kit. I see the crossbars and the legs. What I dont see are the adapters that allow the aero legs to bolt to the HD crossbars, they did come in the kit. Thanks.

asked by: Jason T

Expert Reply:

Hello Jason, thanks for reaching out. We do carry the cap screws and square nuts for mounting the HD bars to the legs. We do not carry the individual washers that would be used for this, so those you would have to source locally. Take a look at the following:

- Replacement M6 x 20 mm Socket Head Cap Screw for Rhino-Rack Accessories - Qty 1 # RR89UB

- Replacement M6 Galvanized Channel Nuts 4 Pack # RR62AN

expert reply by: Jesse M

HD Bar Hardware
(click to enlarge)

Jason T.

9/1/2025

RRRLT600H are the legs that came in the kit, but are clearly listed for aerobars. RB1650B are the HD cross bars that came in the kit. Are you saying these will readily bolt together without the specialty plastic spacers that came with this kit? Or will one or the other come with these adapters?