ACCESSORIES Die Cast Base Retainers Features A * * Solid die cast construction * Positive termination of screen using pre-tapped hole * Cover may be used with slide locks or base retainer BT 217 approved B F Dimensions (mm) Shell Size E F Cable Outlet 20.6 18.0 35.7 24.99 9.52 33.5 20.6 18.0 44.4 33.32 9.52 60.0 39.5 20.6 18.0 58.0 47.04 9.52 C 76.4 39.5 20.6 18.0 74.6 63.50 9.52 D 74.9 39.9 23.4 20.8 72.0 61.11 12.70 A B E 40.4 33.5 A 48.4 B C D C G E D Shell Size Standard Hoods with 6BA Screws Hoods with Mounting Holes Tapped 4-40 UNC for use with Slide locks Base Retainer Part Number Screw Down Version Base Retainer Part Number Spring Clip E 217-9H 217-9HT 217-9RTB 217-9R A 217-15H 217-15HT 217-15RTB 217-15R B 217-25H 217-25HT 217-25RTB 217-25R C 217-37H 217-37HT 217-37RTB 217-37R D 217-50H 217-50HT 217-50RTB 217-50R