McMaster 4550K197 Thick Wall Welded Steel Pipe Nipple, Threaded Both Ends, 3 4 NPT, 4" Long, Sch 80, Class 300 5102 16 Fan Includes Lining No Hood Fan Includes Lining No Hood Window Type Window Fitted Features Single ply fabric Hood Type Lift Front & Ventilated Visor Visibility Type True Color Material Trade Name Pyrad Suspension Type Ratchet Window Color Grey For Cam Lubrication Pressure Rating High Pressure Wall Thickness Rating Thick Shape Straight Fitting Type Pipe Threading Threaded on Both Ends Fitting Connection NPT Male Pipe Size 3 4" Length 4" Construction Welded Pipe Schedule 80 Material Steel Class 300 742" OD 1 3 64" Wall Thickness 0