Kapton - DuPont trademark for polyimide.
kB (kilobyte) - 1,024 bytes. Usually describes bits or bytes, as in transmission speeds measured in kBsec or kilobits per second.
KBps - Kilobits per second.
Kcmil - One thousand circular mils, replaced “MCM” in the 1990 NEC. Sometimes shortened to “kcm.”
Kevlar - A high-strength DuPont polymer used as a cable messenger or strength member.
Keying - The mechanical feature of a connector system that guarantees correct orientation of a connection or prevents the connection to a jack or to an optical fiber adapter of the same type intended for another purpose.
K-fiber - A polyaramid-based material used for jacketing high-temperature cables.
Khz - Kilohertz (1,000 hertz).
Kilo - Prefix meaning thousand.
KPSI - A unit of tensile strength expressed in thousands of pounds per square inch.
KS - Connecting a CATV trunks hard line.
kV (kilovolt) - 1,000 volts.
kVA - Kilovolt ampere.
kW (kilowatt) - 1,000 watts.
Kynar - Arkema Inc. trademark for polyvinylidene fluoride (PVDF).