This Standard specifies mechanical and physical properties of bolts,screws and studs made of carbon steel and alloy steel when tested at an ambient temperature range of 10℃ to 35℃. Fasteners (the term used when bolts,screws and studs are considered all together) that conform to the requirements of this Standard are evaluated at that ambient temperature range. They might not retain the specified mechanical and physical properties at elevated temperatures (see Annex B) and/or lower temperatures.