DICTIONARY OF AUTOMOTIVE TERMS - "Sn"

Sn
The symbol for tin
Snail-cam chain adjuster
Axle-mounted helical cams that allow accurate chain adjustment
Snake
A condition when pulling a trailer where it swings from side to side when being towed too fast
Snake bite
A double puncture of an inner tube, caused when the tire compresses down to the rim from hitting an obstacle too hard or by under-inflation of the tire
Snap fastener
A securing device with a projecting knob on one part that is pressed in securely into a corresponding hole on another part, used on some roadsters to attach the convertible top or tonneau cover to the rear deck and/or windshield header.
Snap ring
A split ring or clip that is snapped into a Groove in a shaft or in a groove in a hole. It is used to hold bearings, Thrust washers, gears, etc., in place. An internal snap ring is used in a groove in a Housing; an external snap ring fits in a groove cut on the outside of a cylindrical piece such as a shaft.
Snap-splice connector
Solderless connector used to tap an additional wire into an existing wire without cutting the original. Often used in installing trailer wiring to a tow vehicle
Snap switch
An electrical switch which makes and breaks the circuit with a quick snap. Also called quick make-and-break switch
Snatch
To take up the drive suddenly when the clutch pedal is released
Snatch tow
A method of recovering a stuck vehicle in which the towing vehicle is in motion before taking up the slack in the tow rope. Use only using special-purpose stretch ropes and specified procedures for this,
SNG
Acronym for synthetic natural gas
Snicking
A positive click and feel, as when the gears click into place.
Snipe
A long extension applied to the handle of a wrench in order to increase the leverage in removing a stubborn bolt or nut.
Snipe-nose pliers
Snips
A tool used to cut straight, circular, and irregular patterns in sheet metal material; available in various designs for straight, left-or right-hand cut.
Snorkel
Snow
Snow and ice control
All activities, including administration, management, planning, and operations, associated with responding to winter road conditions.
Snow and/or ice event
Any weather condition which necessitates snow and ice control operations, such as plowing or sanding.
Snowbird
Recreational vehicle owners who travel to Florida or Arizona during the winter and fly back when the weather warms up at home.
Snow chains
Snow chains

Snow chains

Chains which are wrapped around tires to provide extra traction in snow or ice. They can cause damage to both the tire and the road. They should be used only on short trips while driving at low speeds.
Snow chain switch
Signals the ASR system that snow chains are fitted to the drive wheels
Snow emergency
A declaration by a local government, based on weather and road conditions, that plowing operations will begin and parking restrictions (if any) will be enforced
Snow plan
A document that details specific agency procedures for planning snow and ice control, including equipment, materials, routes, scheduling, use of operators, training, safety, communication, emergency plowing, and clean-up activities
Snow policy
A document that clearly states the principles guiding the scope of an agency's snow and ice control, the level of service, and what services the public can reasonably expect. It describes agency priorities (roads, routes, and activities) and commencement of operations.
Snow shed
A tunnel-like structure built on the side of a mountain to protect the road from an avalanche.
Snow tire
Snub
To slow down a vehicle by activating the brake.
Also see
Snubber
Snubbing Time