This SAE Standard includes couplings and hitches used in conjunction with all types of nonpassenger carrying trailers whose gross weight does not exceed 10@000 Ib. This includes such types as utility@ boat@ camping@ travel@ and special purpose trailer which are normally towed by the conventional passenger car@ light-duty commercial vehicle and multipurpose passenger vehicle@ This standard is intended primarily for ball-and-socket type of couplings and hitches.It should not be construed as a limitation to this type alone@ but should apply where appropriate to ring-and-pintle@ clevis-and-pin@ or any other draft means designed to serve this purpose.
SAE J684C-1969 history
2014SAE J684-2014 Trailer Couplings, Hitches, and Safety Chains-Automotive Type
2005SAE J684-2005 Trailer Couplings@ Hitches@ and Safety Chains-Automotive Type
2004SAE J684-2004 Trailer Couplings, Hitches, and Safety Chains—Automotive Type
1998SAE J684-1998 Trailer Couplings, Hitches and Safety Chains Automotive Type