Semi concealed hinge ZDC black powder coated with steel pin
https://www.allbro.com.au/itemdetails/semi-concealed-hinge-zdc-black-powder-coated-with-steel-pin?category=hardware&code=302058b---19.2&type=2&access=2&id=fa8755e5-ae9a-4948-9209-654cab5e0d31