National Fittings Limited, originally Interfit Techno Products Ltd, was established in April 1993 in Tamil Nadu. Initially focused on manufacturing stainless steel pipe fittings, the company expanded into stainless steel ball valves, increasing its product offerings and production capacity. By 1996, it had begun commercial production of ball valves, supported by an equity issue to fund its expansion. The company specializes in SG Iron Grooved and Screwed Pipe Fittings, Stainless Pipe Fittings, and Ball Valves for both industrial and non-industrial uses.
In 2019, National Fittings Limited consolidated its market position through a merger with Interfit India Limited and Merit Industries Limited, as sanctioned by the NCLT, Chennai. The company also plans to issue 3.25 million equity shares to its promoters, Interfit India Ltd, indicating ongoing strategic financial adjustments to bolster its market presence.