GL Threads

GL threads come in a range of sizes, some simply tooled on borosilicate tubing, some molded on bottles.
The inside diameters show the maximum passthrough.
The seals accommodate tubes or electrodes at nominal diameter ± ~ 1 mm.
There are closed caps, open caps, septum seals, and sealing rings for all sizes.

Dimensions in millimeters.

Size  ID tube (bottle) OD 

Available sealing IDs

GL14 8.5 12 6
GL18 10.5 16 6, 8, 10
GL25 (tube) 18 22 8, 10, 12
GL25 (25 ml bottle) 14.3 (36) 8, 10, 12
GL32 (tube) 24 28 10, 12, 14, 16, 18
GL32 (50 ml bottle) 17 (46) 10, 12, 14, 16
GL45 (tube) 35 40 26, 32
GL45 (100 ml bottle) 30 (55) 26, 32
GLS80 (500 ml bottle) 65 (102)  

 

Some of the ways of connecting with GL threads are shown here, for GL14 options; the larger sizes have similar possibilities.
There are teflon inserts for GL14 that hold and seal 
1.6 mm (1/16"), 3 mm, 3.2 mm (1/8"), and 6 mm tubes or electrodes.

GL14 fittings (/images/uploads/2795.jpg)