The short ton-force (symbol: tnf) is a unit of force.
kilonewtons
The kilonewton is a multiple of the unit bit for Force. The prefix kilo (symbol k) is defined in the International System of Units (SI) as a multiplier of 10 × 102 (1 thousand, short scale), and therefore 1 kilonewton = 10 × 102 newtons = 1000 newtons. The kilonewton has the unit symbol kN.