Steel Tec was a model construction system by Remco Toys, Inc. and made in China. It was on the market from 1992 - 1997. It is generally compatible with Meccano using the same hole pitch and thread type. In most cases missing parts can be substituted with Meccano parts which are currently available.
#7091 - Harley-AppSallyson Motor Cycles
Number of parts
The two photos above are of a nice model built by Edmundo Veiga of Brazil. Apart from a few plastic Steel Tec parts Edmundo made this model entirely from Meccano parts, thus showing that Steel Tec and Meccano are compatible systems.