I presume you are referring to these:
http://www.roadrunneroffroad.com.au/...40-Navara.html
The Road Runner site does not give a part number.
I had these on my GU IV. But there was not much clearance near the bull bar, (NISSAN bull bar). SO I got 2 from threedogs. The T shaped ones. Work a lot better and had clearance for the shackle.
The Road Runner points are stamped with a WLL, 5000kg