LEFT-HAND THREAD: Describes a situation where turning a bolt clockwise loosens or removes the bolt. The Left-hand thread open is only used in cases where the normal turning motion of the object creates a possibility that the object being tightened could release itself over time.
LOCKNUT: Describes a type of nut used in conjunction with a washer or a second nut to lock a mechanism in place.
LOCATING LUG: Describes a pin used for holding a part in a specific position that fits into a recess in a housing bore.
MACHINE SCREW: Describes a screw available with a variety of different heads, that's thread runs the length of the shank.
MEDIUM CARBON: Describes a variety of carbon steel used extensively for sheet metal screws and grade 2 hex head bright cap screws.
MAJOR DIAMETER: Describes the diameter of a bolt or screw, measured from the crest of a thread to the corresponding crest on the opposite side of the bolt or screw
MALE END: Describes a protrusion that fits into a receptacle (female end).
MALE THREAD: Describes an object fitted with external threads like a bolt or screw compatible with female threads.
MASTER LINK: Describes a particular link on a chain shaped like a fish with a round head and twin tails that can be opened by flexing a plate.
MATING THREAD: Describes a thread that engages with another, such as a nut and bolt's male and female threads.
MOUNTING BOLT: Describes a bolt upon which a component may be secured.
NUT: Describes a round, flat fastening device with inner threads.
NUT COVER: Describes a cap that can be attached to a nut to protect it from rusting.
NUT DRIVER: Describes a shaft with a handle on one end and a socket on the other.
NYLON LOCK NUT: Describes a self-locking nut with a nylon insert.
OCTAGONAL BOLT: Describes a bolt with an eight-sided head
OCTAGON NUT: Describes a nut with eight sides
OFFSET LINK: Describes a link in a chain which is often called a "half-link" that increases the number of connections by one.
O-RING: Describes the doughnut-shaped rubber ring placed in a groove and compressed to seal fluids from passing a particular point.
PHILLIPS HEAD SCREW: Describes a type of screw with a deep cross slot apart from the single slot found in conventional screws.
PIN: Describes a small round object used for fastening something or as a pivot.
POP RIVET: Describes a type of tubular rivet which, when fitted to a pop rivet gun and used when a joint can be accessed from only one side.
RIGHT-HAND THREAD: Describes the common direction (clockwise) used to secure a nut to a bolt.
SELF-TAPPING SCREW: Describes a screw that cuts its own threads as it is inserted into the hole.
SETSCREW: Describes a fully threaded bolt fitted with a parallel shaft used to secure metal parts together.
SHANK: Describes the part of a bit held in the drill.
SPEED NUT: Describes a self-locking device used to attach plastic parts to a steel car body made up of secure sheet metal screws that engage with the screw thread.
STAKED NUT: Describes a nut secured to a bolt by a metal tab.
TAPPET: Describes the screw used to adjust clearance between the valve stem and the lifter or the rocker arm.
THREAD FILE: Describes a specialist tool that is used to restore internal or external threads by filing
THROUGH BOLT: Describes a type of bolt that can be inserted through the parts of an assembly and secured on the other side by a nut.
THRUST WASHER: Describes a hardened steel washer placed between two moving parts, preventing longitudinal movement while providing a bearing surface for the thrust surfaces of the parts.
THUMBSCREW: Describes a type of nut or screw whose projections enable it to be turned through a thumb and forefinger.
THROUGH BOLT: Describes a type of bolt that fits into a bracket to secure an item in place.
UNDERHEAD COLLAR: Describes a type of washer fitted under the head of a bolt or screw.
UNION NUT: Describes a type of wing nut used to secure a connection between pipes or rods.
UNIVERSAL JOINT (UJ): Describes a type of flexible double-pivoted joint that allows driving power to be carried through two shafts that are at an angle to each other.
UNIVERSAL JOINT SOCKET: Describes a type of socket with a universal joint designed to reach into cramped working areas.
WASHER: Describes a small, flat disc with a hole in the centre, produced in either metal, rubber, plastic, or leather, placed under a nut to prevent damage to the part on which it rests.
WING NUT: Describes a type of nut with two flat projections that can be tightened or loosened manually between a thumb and finger.
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