Kapton®
DuPont's trademark for polyimide

kB
K-byte. 1,024 bytes. Usually decribes bits or bytes, as in transmission speeds measured in kB/sec or kilobits per second

kbps
Thousands of bits per second (bps)

kcmil
One thousand circular mils, replaced "MCM" in the 1990 NEC

Kevlar®
A high strength DuPont polymer used as a cable messenger or strength member

K-Fiber
Asbestos free substitute for heat resistant high temperature applications. K-Fiber jacketed high temperature cable equals or exceeds the abrasion resistance of a comparable asbestos jacketed cable

Kilo
Prefix meaning thousand

kV
Kilovolt (1,000 volts)

kVA
Kilovolt Ampere

kW
Kilowatt. 1,000 watts of power

KYNAR®
Atochem trademark for polyvinylidene fluoride (PVDF)