EN
Technical drawing of the cross-section 30/60 degree flank angle

Round Thread DIN 168

The DIN 168 round thread is a special type of round thread primarily used for closures of glass containers. This includes bottles and vials in laboratory technology or the pharmaceutical field, as well as a variety of common household glass containers.

The glass thread is realized as a round thread to facilitate manufacturing. In addition, round threads are generally less susceptible to dirt and easier to clean, which is a significant advantage for most glass containers, especially in sterile environments. A unique aspect of the DIN 168 round thread is that the flank angles for internal and external threads differ significantly. The glass container has a flank angle of 60°, while the screw-on cap has only 30°.

The thread designation for the glass thread consists of the abbreviation GL and the maximum external diameter in mm. The DIN 168 round thread is a metric thread, hence all dimensions are specified in mm.

The thread table for the DIN 168 round thread includes a set of dimensions for both the external and internal threads, namely the external diameter and core diameter. For both diameters, there is a minimum and maximum value within which the actual dimension must fall. The pitch is also listed. Dies and taps for the DIN 168 round thread can be made upon request!

To the overview thread standards
Thread identificationMale threadInternal threadPitch mmTaps in our Online-ShopDies in our Online-Shop
 Outer diameter mmCore diameter mmOuter diameter mmCore diameter mm   
 max.min.max.min.max.min.max.min.   
GL 88,007,656,606,258,308,106,906,702,00Link to the tapsLink to the thread cutting die
GL 1010,009,658,608,2510,3010,108,908,702,00Link to the tapsLink to the thread cutting die
GL 1212,0011,6510,6010,2512,3012,1010,9010,702,00Link to the tapsLink to the thread cutting die
GL 1414,0013,6012,3211,9214,3514,1012,6712,422,50Link to the tapsLink to the thread cutting die
GL 1616,0015,6014,3213,9216,3516,1014,6714,422,50Link to the tapsLink to the thread cutting die
GL 1818,0017,5015,9815,4818,4018,1016,3816,083,00Link to the tapsLink to the thread cutting die
GL 2020,0019,5017,9817,4820,4020,1018,3818,083,00Link to the tapsLink to the thread cutting die
GL 2222,0021,5019,9819,4822,4022,1020,3820,083,00Link to the tapsLink to the thread cutting die
GL 2525,0024,5022,9822,4825,4025,1023,3823,083,00Link to the tapsLink to the thread cutting die
GL 2525,0024,5022,6422,1425,4025,1023,0422,743,50Link to the tapsLink to the thread cutting die
GL 2828,0027,5025,9825,4828,4028,1026,3826,083,00Link to the tapsLink to the thread cutting die
GL 3232,0031,3029,3028,6032,5532,1529,8529,454,00Link to the tapsLink to the thread cutting die
GL 3636,0035,3033,3032,6036,5536,1533,8533,454,00Link to the tapsLink to the thread cutting die
GL 4040,0039,3037,3036,6040,5540,1537,8537,454,00Link to the tapsLink to the thread cutting die
GL 4545,0044,3042,3041,6045,5545,1542,8542,454,00Link to the tapsLink to the thread cutting die
GL 5050,0049,2047,3046,5050,8050,3048,1047,604,00Link to the tapsLink to the thread cutting die
GL 5656,0055,2053,3052,6056,8056,3054,1053,604,00Link to the tapsLink to the thread cutting die
GL 6363,0062,0060,0059,0064,0063,4061,0060,405,00Link to the tapsLink to the thread cutting die
GL 7070,0069,0067,0066,0071,0070,4068,0067,405,00Link to the tapsLink to the thread cutting die
GL 8080,0079,0077,0076,0081,0080,4078,0077,405,00Link to the tapsLink to the thread cutting die
GL 9090,0089,0087,0086,0091,0090,4088,0087,405,00Link to the tapsLink to the thread cutting die
GL 100100,0089,8097,0095,80101,00100,4098,0097,405,00Link to the tapsLink to the thread cutting die
GL 112112,00110,80109,00108,80113,00112,40110,00109,405,00Link to the tapsLink to the thread cutting die
GL 125125,00123,80122,00120,80126,00125,40123,00122,405,00Link to the tapsLink to the thread cutting die