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04 in Grommet Location Two on Each Corner Standards FM Approved NFPA701 Duty Rating Light Grommet Spacing 24 in Fastener Type Grommets Grommet Hole Diametre 4/5 in Grommet Material Brass
-24 Fastener Length 1 3/4 in Fastener Thread Direction Right Hand Fastener Thread Type UNF (Fine) Fastener Thread Style Partially Threaded Fastener Industry Standards ASME B18
069 In Load at Deflection 2
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 23 in Rough Opening Diametre 20 1/2 in Rough Opening Shape Square Fits Fan Diametre 20 in For Duct Shape Not Applicable Free Area 2
RULAND MANUFACTURING SP12SS Shaft Collar System of Measurement Inch Bore Type Round Bore Diametre 3/4 in Bore Thread Size Not Applicable Collar Outside Diametre 1 1/2 in Inside Height to Flat Not Applicable Clearance Diametre 1
OSG 61690 Screw Machine Drill 19.00mm HSS Terminal Blocks 04 in Grommet Location TwoOSG 61690 Screw Machine Drill Bit Drill Bit Size 19. 00 mm Drill Bit Point Angle 120 Degrees 4 Facet Point High Speed Steel TiN Non Coolant Through Cutting Direction Right Hand Decimal Equivalent 0. 7480
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