hi guys, this was taken in my blazer k5, 1990, can anyone tell me what it is?

 

I believe those bosses are the anchor bolt locations for the rear seat shoulder belt.

 

and do you have any idea where can i get belts like these, even just the brackets? i actually wasn't able to find a picture in order to understand how it looks

 

Junkyard, ebay, perhaps LMCTruck.com or ClassicTruck.com...

 

i don't know what it looks like so it's hard for me to know what i'm looking for.
lmc got none, to find a k5 in Israeli junkyards is like winning a lottery and i couldn't find anything on eBay either. i just need a picture of that thing in order to know what i'm looking for more clearly

 

Get looking. Google Image search might help. A search for "K5 rear seat belt" might just work.

 

no luck, I've tried dozens of words combination, couldn't find a single snapshot of a belt

 

A retractor bolts straight to the top and there is another buckle for it in the seat. It really isn't something I would go looking for unless you are being forced into it due to regulations. Bad things can happen if someone is belted in and the vehicle is rolled.

 

you're right on the money. it is only due to safety regulations which are strict in Israel.
i must have those seat belts in order to drive with four passengers.

 

If you need shoulder belts in the back, I would fab a roll cage and bolt the shoulder belts to the roll cage, not to the top. Just safer that way.

If you don't go that route, then get two more buckles to mount to the seat, and two retractors to bolt to the top. Generic stuff will work.