On my '49 Chevy 3100 1/2 ton the part in the picture was under the bed and attached to an angle iron brace spanning between the frame members. It is obviously cut off. What function did it serve and what is it called?
best regards, Joe
'49 3100 "Sweet Caroline" because the truck has fabulous curves .... like Caroline!
Does not match spare tire carriers on Ebay. If it was attached to an add-on/non original "angle iron" cross member, it's not original. Also depends on where under the bed. Front middle rear. And what direction the cut off was facing. Except for light construction as Martin said, I would have guessed trailer hitch. But the part has unique, era correct form.
I'm away on an ego trip. Will be back on Feb 30. I'm not an Auto Mechanic, but I play one on TV. I charge $0.02 for every opinion and I take Paypal. Plan B is always better than plan A, by definition.