Bosch Rexroth”sQR1series of fittings provides an inch and metric (ISO-G) program for thecompany”s pneumaticcomponents. In addition to the mini and standard programs, the completefitting program also includes various function fittings. The QR1 (quickrelease) series includes connections for all types of applications.Push-in fittings are equipped with a plastic release ring that enablesfast connection and release of compressed-air tubing. The seriesfeatures an oval release ring. Mini fittings support plastic tubing ODsof 1/8″ to _” and three to six mm. Standard fittingscan be used for tubing ODs of 5/32″ to _” and four to 16 mm.
 
Versions at a glance:
Mini
Thread sizes: 10-32UNF and 1/8″, M3 – G1/8

Tubing O.D.: 1/8″- 1/4″, 3 – 6 mm
Standard 
Thread sizes: 10-32UNF – 1/2″, M5 – G1/2

Tubing O.D.: 5/32″ – 1/2″, 4 – 16 mm
Function fittings
Thread sizes: 10-32UNF – 1/2″, G 1/8 – G1/2

Tubing O.D.: 5/32″ – 1/2″, 4 – 12 mm