Sigma Tool & Machine

Quality T-Nuts, Furniture Clips and Insertion Equipment.

Sigma Tool & Machine has been manufacturing and supplying qualityT-Nut, T-Nut insertion equipment and furniture clips for the upholstered furniture industry for over 60 years.


Sigma introduced and patented the first 4 prong T-Nuts with the now familiar 8-sided base. which has become the standard configuration for machine driven t-nuts. 


Today Sigma manufactures many variations of T-Nuts and T-Nut insertion equipment designed to meet the needs of the most demanding applications. Sigma also offers a number of custom made insertion equipment including fully automatic, semi automatic, and robotic T-Nuting systems. These systems reduce labour costs and eliminate the need to pre-drill holes.


Sigma also manufactures clips for furniture springs, including hand-stapled clips, machine inserted clips, and wire clinching clips as well as offering a variety of machines and tools for the installation of these clips.


Every Sigma Product is manufactured with the exceptional quality that our customers have come to expect and deserve.

Sigma Tool and Machine is ISO 9001:2008 Registered