Push-to-connect fittings for thermoplastic tube connections install quickly without nuts, sleeves, internal tube supports, or tools. They are available from 1/8 to 1/2 in. and 4 to 12 mm OD in polyethylene, nylon, and polyurethane for tubing at vacuum to 250 psi. Made of brass with Buna-N seals, they come in two styles — nickelplated NP with rubber O-ring or PTFE ring or non-plated PP with NPTF threads.

Tompkins Industries Inc., (800) 255-1008, www.stockmeup.com