hexagonal nut การใช้

• This hexagonal nut carried on into the later Series 2 and 3.
• To find the anode, look on the top of the water heater for a large, hexagonal nut that isn't connected to any pipes.
• Its logo, a hexagon, was used in one form or another from 1912 to 2014; it represents a hexagonal nut, a universal fastener.