The spindle (4) and ball (3) are interengaged by mating dovetail formations.

Moreover, the base (4), together with the cavity in the substrate, can form a dovetail assembly.

In particular, the connection made from tails (3) and grooves (6) can be a dovetail connection.

The cap and its mating part have a dovetail form which allows the parts to be assembled by an axial sliding movement, and to be then secured in their correct relative positions so that a shaft bearing is formed.

The latter is connected by a dovetail assembly to a support (32, 34, 35) which is removably secured to a bracelet or a glove.

The hub includes external splines (7) which dovetail with internal splines (31) of the rubber sleeve (27).

The first core piece and the second core piece can be joined by interlocking engagement, such as by male and female dovetails.

Each major assembly and/or subassembly of the submachine gun (10) is threaded together or dovetailed into place permitting rapid interchangeability at the field level.

In one alternative (70) using a dove tail arrangement, one among an upper base portion (72) and the lower base portion (74) can slide into each other to form the compact holster.

Each pole piece may include a pair of inclined slots (21) receiving complementary terminal portion (23) of a yoke segment and defining a dovetail part.

A second generally planar element interlocks through a dovetail-type joint with the first element to maintain the first element in a folded, corner-like condition.