B4W-8 1/2" 20 tpi with a 1/2" Bore rod ends. Barnes 4wd is proud to introduce our new line of Heat Treated 4130 Chromoly Heims with Kevlar liners. We have the small 3/8" all the way up to the 1 1/4". These heims are made of the best materials and the heat treating only makes it better. We have nine different sizes so you can find just the right size for your application. Ultimate Radial Static Load - 16,223 lbs.