brass screw plug( round,hexagonal ) brass with nickel plated/nylon CE,RoHS standard ... °C~+110°C,instantly can be +120°C.Property:1,plug the extra or reserved holes ,to make the product beautiful2 ... .58221124M24×1.59241227M27×210271430M30×211301532M33×211331536M36×211361540M42×211421548 brass screw plug