AUTOMATIC CENTRIFUGAL CLUTCH; DEVELOPS 58 INCH LBS. BRAKING TORQUE AT 270 R.P.M. LIMITING SPEED; CONTAINS FOUR SPRING LOADED BRAKE SHOES; OVERALL DIA. OVER SHOES 6.437 INCHES; OVERALL WIDTH 1.500 INCHES; BORE DIA. 1.375 INCHES; BORE LENGTH 1.437 INCHES; .312 INCHES WIDE KEYWAY; .250 INCHES GRUBSCREW FITTED OVER KEYWAY; USED ON WINCH ASSEMBLY MOD D40493 ON BOARD 270 FT. B CLASS COAST GUARD VESSELS