Straight Union - Conduit to Box Thread Gender Female to Male Trade Size 3 1/2 in Compatible Conduit Type Vertical or Horizontal Rigid Conduit Compatible Conduit Trade Size 3 1/2 in Ends - Hazardous Fittings 3 1/2 in FNPT x 3 1/2 in MNPT Overall Length 4 15/16 in Overall Height 4 15/16 in Overall Width 4 15/16 in Aluminum Finish Powder Coated Hazardous Location Rating Class I Division 1 and 2 Groups A B C D Class II Division 1 and 2 Groups E F G Class III UNY