Hellermanntyton 90 elbow conduit fittings fixed external thread hg 90 series hellermann tyton 166 22214 the hellermanntyton 166 22214 hg21 90 is a 90deg elbow conduit fitting with a fixed m16 external thread from the hg 90 series the one piece elbow is fast fit and highly resistant to solvents and oils the elbow has been manufactured from polyamide 66 pa66 hellermanntyton 166 22214 hg21 90 pg16 helaguard conduit screw fitting