37° flare hydraulic coupling
1/8 - 2"
Parker Tube Fittings
Today, Parker offers a broad range of Triple-Lok fittings meeting SAE J514, ISO 8434-2 and military standards and specifications.
The Triple-Lok design is quite simple. The tube fitting consists of three pieces: the body, the nut and the sleeve. The tube end is flared at a mating 37° angle and sandwiched between the fitting nose (seat) and the sleeve creating an effective seal between the fitting nose and tube flare or hose.
Parker's Triple-Lok fittings are manufactured in steel, 316 stainless steel and brass for optimum fluid compatibility and corrosion resistance. Furthermore, available sizes range from 1/8" tube O.D. to 2" tube O.D. in several configurations. Adaptability to global ports is another key benefit of Triple-Lok. (Standard ports include: SAE, straight thread ISO-6149, NPT, BSPT, BSPP and DIN.)
The Triple-Lok tube fitting is also readily available for metric tubing and hose adapter applications. Simply by changing the industry standard sleeve, the same Triple-Lok body can be adapted to metric tubing in sizes ranging from 6 mm tube O.D. to 38 mm tube O.D. Likewise, by using only the body without the nut and sleeve, the Triple-Lok fitting is used as an industry standard hose adapter.








