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File Allocation Table

A table that the operating system uses to locate files on a disk.

File Transfer Protocol

FTP; the protocol used on the Internet for sending files.

Filled

The seams in a welded body panel that have been covered with lead, putty, or plastic.

Filled Axle

An I-beam axle with concave portions that are reinforced with metal gussets.

Filler

1. A class of materials used in brake linings to reduce noise and improve heat transfer 2. A material used to fill dents and repair damaged body parts.

Filler Cap

Manually removable lid or seal on the filler neck of a fuel tank, radiator, or other reservoir.

Filler Metal

The metal or alloy added for bonding in making a welded, brazed, or soldered joint.

Filler-neck Restrictor

A restriction plate located in the inlet of the fuel tank to prevent leaded fuel from being put into the tanks of cars that require unleaded fuel.

Fillet

The radius connecting the journal to the crankshaft cheek.

Fillet Weld

A nearly triangular cross-section weld joining two surfaces at approximately right angles to each other in a lap joint, T-joint, or corner joint.

Filter

1. A system designed to remove solid particles. 2. A device used with the drier, or as a separate unit, to remove foreign material from refrigerant 3. A device used to clean the air as it enters the engine. 4. A device used to remove the ripple produced by a rectifier.

Filter Bypass

A spring-loaded valve built into or next to most oil filters that allows oil to pass around the element if it becomes clogged.

Filter Drier

A device having a filter to remove foreign material and a desiccant to remove moisture from refrigerant.

Filter Plate

An optical material that protects the eyes against excessive ultraviolet, infrared, and visible radiation.

Final Drive

The pinion, ring, and differential gears that provide power to the drive wheels.

Final Drive Ratio

The ratio between the drive pinion and ring gear.

Final Drive Ratio

The ratio between the number of times a rear-wheel-drive vehicle's driveshaft turns and the number of times the rear axle turns. If a vehicle has a 3.00

Fins

Thin metal strips in an evaporator, condenser, or radiator, found around the tubes to aid in heat transfer.

FIP

Federal Implementation Plan ( implemented if state fails to submit a SIP).

FIPL

Fuel injector pump lever.