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L Aluminum Wall Backdraft Dampr Damper Application Backdraft For Nominal Duct Diametre Not Applicable Frame Material Galvanized Steel Number of Panels 1 Maximum Air Velocity 2000 fpm Overall Height 21 in Rough Opening Diametre 18 1/2 in Rough Opening Shape Square Fits Fan Diametre 18 in For Duct Shape Not Applicable Free Area 2
OSG 10078505 Screw Machine Drill Bit Drill Bit Size #47 Drill Bit Point Angle 130 Degrees Notched Point Cobalt TiN Non-Coolant Through Cutting Direction Right Hand Decimal Equivalent 0
00 mm HSS-E Black Oxide Right Hand Thread Length 15
00mm ANSI Code M170D052Z06RD10 Compatible Hardware Insert Screw M3
HUOT 13415 Reamer Storage 29 Compartments Strainers L Aluminum Wall Backdraft DamprHUOT 13415 Reamer Dispenser Original Holds A To Z Steel and Vinyl Overall Case Width 14 5 8 In Overall Case Depth 7 3 8 In Overall Case Height 7 3 4 In Number of Compartments 29 Number of Drawers 3 Cutting Tools Not Included