A multifunctional bolt head comprises a bolt head body (1).

The bolt (3) comprises a threaded portion and a bolt head.

The bolt head cover (10) is arranged to be placed over the bolt head (16).

In a preferred embodiment a screw or bolt head (11) is provided to impart rotational movement and the flexible core is made up of bound wires.

The leveling bolt (13) comprises a bolt head (13a) and a screw (13b).

The screw includes a threaded section (21) and a bolt head (23).

The bearing element (47) is held in the bearing receptacle (41) by means of a bolt element (56) comprising a bolt shaft (59) and a bolt head (62).

The bolt has an elongated oblong-shaped bolt head extending through the wear plate, flush with a surface of the wear plate.

An outer end of the shaft member (6) has a screw-head shape or a bolt-head shape.

The fastener system may include an externally-threaded core bolt having a frangible driving provision and a core bolt head.

The device includes a sleeve (12) through which a bolt head (62) is drawn.

The second arm (30) engages a bolt head (4) of the lock.

The bolt (3) includes a bolt head (31), a shaft (32) extending from the head (31) and a projection (34) extending radially outwardly from the root of the shaft (32) beyond the head (31) as integral parts.

A stud bolt (1) has a bolt head (2), a bolt shoulder (3) having a smaller diameter than the bolt head (2), and a screw thread section (4b) having a smaller diameter than the bolt shoulder (3).

Locking device for wheel bolt (1) with bolt head (2) and threaded shaft portion, and a blind hole opening at a bolt end, and has at least two radial recesses (4).