British Bomb, 4000 lb GP, Mk 1, Mk 2
Mk 2 - The body consists of a hollow steel easting open at each end, with six strengthening beams welded inside the nose end. The nose bush is screwed and welded into the nose, and a male base plate is screwed into the base. Exploder containers are threaded into the nose bush and the base plate, and are secured in place by locking screws. The rear end of the body is shaped to receive the tail assembly. The rear face of the body has two sets of four threaded holes for the wing bolts of the tail assembly, or the transit base.
Mk 1 - Similar to the Mk 2, with the exception of two side fuze pockets near the rear end of body, afforded by two adapters welded into the body and fitted with exploder containers which extend inward at a 45° angle to the axis of the bomb.
The bomb body has three sets of tapped holes for the securing screws of a central suspension lug, and the fore and aft hoisting brackets. The suspension lug is secured by four bolts at the center of gravity.
Tail fins are usually painted red when time pistol is used.