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Mk I-The Body consists of a hollow steel casting open at each end, with the nose end internally threaded to house a nose bush, Which is screwed and cemented in position. The bush is bored and threaded for part of its lengths to take an exploder container which is screwed and cemented in position. The exploder container is threaded internally in the open end to house a detonator holder, which is also cemented in position and locked with a locking screw. The detonator holder is threaded internally in the open end to take a pistol or a transit plug. The after end of the bomb body is shaped externally to take a tail when in position on the bomb. A male base plate screws into the tail end of the body and is cemented in position. The filling plug is bored and threaded internally to receive an exploder container, which houses the detonator holder and is inserted and locked in the same manner as the one used in the nose of the bomb.
Mk II-Similar to the Mk I, except that the spigot on the tail end of the bomb body for locating the transit base and the seating on the bomb body for the suspension lug, are omitted.
Mk III-Similar to Mk I, except that the exploder containing and detonator holder are not fitted; the nose being plugged with a special adapter and transit plug which are welded in position.
Mk IV-Similar to Mk II body, except that the nose is permanently plugged in a manner similar to the Mk III.
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