ADJUSTING SHIM: Describes a thin washer that reduces or increases the clearance between two components.
ADJUSTING SLEEVE: Describes a small cylinder that sits on the end of the tie rod, which shortens or lengthens the rod to make changes in the toe-in and toe-out function.
A-SCREW: Describes a type of sheet metal screw notable for their sharp-pointed ends with both fewer and deeper threads than type AB.
BENDIX SCREW: Describes the helical screw on the shaft of a starter motor.
BOLT: Describes the securing device to which a nut is threaded.
BOLT AND NUT: Describes a pair of objects with matching screw threads, often used as fixing devices.
BOLT HOLE: Describes the hole in metal through which a bolt is either inserted or screwed in place.
BOSS: Describes an extension or strengthened section that holds the end of a pin or shaft.
BUTTERFLY VALVE: Describes a nut with wings to be turned by thumb and finger. Sometimes called a "wing nut."
BYPASS AIRSCREW: Describes a screw located on the airflow sensor of a fuel injection system that adjusts the amount of air allowed into the air-fuel mixture.
CAP NUT: Describes a nut that is closed at the threaded end, often with a dome.
CAPSTAN SCREW: Describes a screw or bolt with a round head and one or more holes through which a bar may be inserted to secure or remove it.
CARRIAGE BOLT: Describes a bolt with a smooth dome head that a screwdriver or wrench cannot remove from the dome-side.
CAPTIVE NUT: Describes a nut that fits into a cage and is welded in place.
CASTELLATED NUT: Describes a nut with several lugs protruding from one end, causing it to resemble the turrets on of a castle. The castellated nut is used on a shaft with a hole drilled in it, secured to the shaft by passing a cotter pin through an opening in the nut and the shaft hole.
CENTRE LOCK NUT: Describes a spinner that secures the wheel to the hub.
COUNTERSINK: Describes the action of marking a counterbore so that the head of a screw may sit flush or below the surface.
COUNTERSUNK HOLE: Describes a hole with sloping sides where the top of the hole is larger than the bottom of the hole as in the shape of the letter "V."
COUNTERSUNK SCREW: Describes a type of screw where the underside of the head is tapered to fit into a countersunk hole with tapered sides. When the screw is screwed in all the way, the top of the screw is flush with the surface.
COARSE THREAD: Describes the threads of a screw that are wider apart, while the opposite to fine thread screws.
CONTROL CABLE: Describes a type of wire cable that runs from a lever to a device that it either operates or regulates.
COTTER PIN: Describes a type of fastener shaped like a pin but split up the centre.
CROSS-BOLT: Describes the system of securing main bearing caps with four bolts per cap in which two bolts support the bearing cap from below, in a conventional manner, while the two other bolts enter the bearing from the side, passing through the sides of the engine block.
CROSS-HEAD SCREW: Describes a screw with a slot that looks like an X or + into which the tip of the blade of a Phillips screwdriver can be inserted.
DOWEL PIN: Describes a metal pin passed through two parts to provide proper alignment and prevent movement.
EXTERNAL THREAD: Describes a type of thread consisting of projecting ridges on the outside of a part, such as a bolt or a screw
FILLISTER SCREW: Describes a set screw whose head is deep and rounded.
FILL PLUG: Describes a type of small screw-in plug situated in the steering box removed for topping up oil.
FEMALE: Describes a fitting that sits inside another part in order to form a connection of some kind-the female part being the socket or hole into which another piece is inserted.
FEMALE END: Describes the receptacle into which the male end is inserted.
FEMALE THREAD: Describes an internal thread
FLAT TAPPET: Describes a type of tappet with a flat contact surface.
FLAT WASHER: Describes a disc resembling a coin with a hole in the middle.
FLY NUT: Describes a type of wing nut.
FLYWEIGHTS: Describes sets of special weights designed to automatically control other mechanisms such as accelerators or valves.
FULCRUM PIN: Describes a pin that acts as a pivot, such as a kingpin
FULCRUM RING: Describes one of two rings on either side of a clutch diaphragm spring on which it pivots.
GRUB SCREW: Describes a fully threaded, headless screw.
HELICAL SPRING LOCK WASHER: Describes a locking device for threaded fasteners
HITCH PIN: Describes a heat-treated, hi-strength steel pin with a flange is at one end and an opening at the other end, through which a pin can be inserted.
INCOMPLETE THREAD: Describes a thread whose profile is incomplete.
INCREASED SHANK: Describes a shank diameter that is greater than the thread diameter.
INTERNAL THREAD: Describes the thread on the inside of a nut compatible with the external thread of a bolt.
FLANGE BOLT: Describes a bolt with a fillet as part of the bolt head
FLANGED HEAD: Describes a bolt head that has been fitted with a fillet.
JAM NUT: Describes a secondary nut on a screw or bolt which locks against the first nut preventing it from coming loose.
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