The Triple-Lok (the 37° flare fitting) design is very simple. It uses an easily produced flare at the tube end to seal and holds fluid under high pressure. The fitting consists of three pieces: the body, sleeve and nut. The tube end is flared at a 37° angle and sandwiched between the fitting nose (seat) and the sleeve (support) with the nut, providing a very effective (single) seal between the fitting nose and the tube flare.

The Triple-Lok Body.
All straight bodies are made from cold drawn bar stock. All shapes are of one piece forged construction eliminating potential leak paths of multiple component constructions such as brazed shapes. Triple-Lok fittings’ forged shapes in steel also feature higher hardness for high pressure capability and minimum nose collapse (typical of sizes -10 and under) during repeated assembly.

The Triple-Lok Sleeve.
Triple-Lok fitting support sleeves are cold formed and heat treated for an optimum combination of strength and ductility. Cold forming also eliminates the problems of laps, folds, stringers, etc., associated with sleeves machined from bar stock.

The Triple-Lok Nut.
Nuts for all but the three largest sizes (-20, -24 and -32) are cold formed. Cold forming increases material strength and its fatigue properties, imparting high strength and longer service life to the nuts. Larger nuts, which are less severely stressed, are made from cold drawn bar stock.

N.B. - Triple-Lok components are available from SMP in brass and stainless steel.

To download our PDF file containing information on all the TripleLok Fittings we stock, please click here (258k)

This page offers a selection of the Triple-Lok Brass Fittings available from SMP. If you can't find what you're looking for, please contact us