- H -

Housekeeping

The type of safety in the shop that keeps floors, walls, and windows clean, lighting proper, and containers and tool storage correct.

Housing Bore

The inside diameter of a bearing housing.

Housing Breather

A venting device that allows air to enter or leave the axle housing.

HP

An acronym for horsepower.

HPCA

High pressure cold advance.

HPPC

An acronym for Hybrid Pulse Power Characterization.

HPV

An acronym for human-powered vehicle.

HRS

An acronym for hot-rolled steel.

HSC

An acronym for high-swirl combustion.

HSMO

An acronym for Hydraulic System Mineral Oil; A brake fluid made from a mineral oil base, used by a few European carmakers. DOT specifications do not apply to HSMO fluids, and HSMO fluids cannot be mixed with DOT fluids.

HSO

High specific output.

HSS

An acronym for high-speed steel.

HTH

Computer speak ( Hope this ((that)) Helps.

HTI

An acronym for Hand Tools Institute.

HTML

An acronym for Hyper Text Markup Language; the authoring language used to create documents on the world wide web.

HTS

Heavy duty synthetic.

HTTP

An acronym for Hyper Text Transfer Protocol; the underlying protocol used by the world wide web . HTTP defines how messages are formatted and transmitted, and what actions web servers and browsers should take in response to various commands.

Hub

The center off a wheel.

Hub Cap

A wheel covering.

Hub Cap

See hubcap.