 | Glossary |  |
| | | | Welcome to our terminology page. Here you will find information on the terminology. | | | | |
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  | | | Click on the letters below to navigate and get an explanation of the word you are looking for.
Hardware
Parts added or attached to AG part. Also known as "attachments".
Heat-Absorbing Glass
Glass for intercepting appreciable portions of radiant energy, especially solar energy, in specific transmittance values as defined in ASTM C 1036. It is obtainable as float and patterned glass.
Heat-Resisting Glass
Glass able to withstand high thermal shock, generally because of low coefficient of expansion.
Heat-Strengthened Glass
Glass that has been heat-treated to a state less than that of fully tempered glass. Specified by ASTM 1048 (Kind HS) as having a surface compression of not less than 3,500 pounds per square inch (psi) or an edge compression of not less than 5,500 psi. Heat-Strengthened glass is approximately two times as strong as annealed glass of the same thickness and has a much increased thermal endurance. Heat-strengthened glass is considered a safety glass; however, it will not completely dice as will fully tempered glass.
Heat-Treated
Term sometimes used for both fully-tempered glass and heat-strengthened glass.
Heated AG Parts
Parts which have a heater grid (backlights) or metallic coating (windshields) used to defrost the part.
Hermetically Sealed Unit
An insulating glass unit made up of two liters of glass, separated by a spacer, or equivalent product (at the full perimeter), which is filled with a moisture absorbing material.
High-Transmission Glass
Glass which transmits an exceptionally high percentage of visible light.
HUD
Name for technology in which the vehicle's instrument readings are projected onto the windshield. The replacement windshield for vehicles with HUD is more expensive than for those which are not HUD equipped.
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