Metalmech Engineering offers Reducer for Cable Gland. Metal Engineering & Treatment Co is an ISO 9001:2000 accredited company. The Company also manufactures various types of brass cable glands, brass fasteners, brass inserts and other brass components. The Reducer for Cable Gland is used to effectively reduce the entry thread diameter of enclosures to accept the smaller thread diameter [and often different thread form] of a gland whose dimensions are determined by cable size.