Hellermanntyton cable gland fitting with strain relief and cable seal hg scg hellermann tyton 166 22103 the hellermanntyton 166 22103 hgl21 is a straight cable gland fitting from the hg scg series this straight fitting is supplied with an m20 thread and comes complete with cable seal and strain relief this straight cable gland provides strain relief and is also highly resistant to solvents and oils hellermanntyton 166 22103 hgl21 scg m20 straight conduit fitting ip68 m20 21mm