B 2010 SERIES 2-PIECE RIGID CONDUIT CLAMP O TRADE SIZE 1", IS SUITABLE FOR USE WITH PIPE/RIGID CONDUIT OT STRUT SYSTEM. THE 1-3/8" OD CLAMP FEATURES 14=GAUGE 304 STAINLESS STEEL CONSTRUCTION. IT HAS WORKING LOAD LIMIT OF 600 LB. CLAMP COMES WITH COMBINATION RECESS HEX HEAD MACHINE SCREW AND SQUARE NUT.