eBay

This is a lot of 10 pcs of 5/16 drive type straight grease fittings. Drive type fittings have no threads but are meant to be pressed into a round bore 5/16 hole. These are good quality old stock from a long closed machine shop, meaning these may have some dirt and dust from sitting. These are not marked but I have no doubt these are USA made as all the fittings bought from this machine shop were in very old boxes.