PROTO - BOCALLAVE 28MM

KEY HOLE OR SOCKET; TYPE OF HOLE: DOUBLE HEXAGON; HOLE SIZE: 28 MM SQUARE SIZE: 1/2 IN; MILLIMETER SERIES WITH SQUARE FEMALE FITTING. SHORT LENGTH. ACCORDING TO IRAM STANDARD 5236. RECEPTION CONDITION: POINTS 5 AND 6 OF IRAM STANDARD 5236