Briggs and Stratton Oil Drain Plug part# 691686 has 1/4" NPT. Following is a list of some of the model series that use this drain plug; 250400, 256400, 91200, 91400, 92200, 93200, 93300, 93400, 94000, 94200, 94300, 95200, 95300, 95400, 96300, 97300, 97400, 09A400, 09K400, 110400, 111400, 113400, 120200, 120300, 120400, 121000, 121100, 121200, 121300, 121400, 121A00, 122000, 122100, 122200, 122300, 122400, 123300, 123400, 124000, 124300, 124400, 126300, 126400, 127300, 127400, 128300, 128400, 12A100, 12A300, 12A400, 12B400, 12C100, 12C300, 12C400, 12D100, 12D200, 12D300, 12D400, 12E100, 12E300, 12H100, 12H200, 12H300, 12K300, 12L200, 12L300, 12R100, 12R200, 12S100, 12S200, 12S400, 12T100, 12T200, 12T300, 12T400, 12Z300, 133200, 133400, 134400, 135200, 135400, 136200, 137200, 13H100, 13H300, 13L100, 13L300, 150100, 150200, 150300, 157100, 157300, 15A100, 15B100, 15C100, 15D100, 15R100, 15T200, 15Z100, 15Z300, 19H100, 19H200, 19L100, 19L200, 201300, 201400, 202300, 202400, 203400, 204300, 204400, 205300, 205400, 206400, 207400, 20A100, 20A400, 20B400, 20C100, 20C400, 20D400, 20E100, 20E200, 20E300, 20E400, 20F400, 20G400, 20H100, 20H200, 20L100, 30L200, 20M100, 20M200, 20M300, 20M400, 20P200, 20P400, 20S100, 20S200, 20T100, 20T200, 210300, 210400, 212300, 212400, 213400, 216100, 216300, 217300, 21A100, 21A400, 21B400, 21C100, 21C200, 21C300, 21M100, 21M200, 21M300, 31M400, 21P200, 21S100, 21S200, 21T100, 21T200, 21X300, 21Z100, 21Z300, 250400, 256400, 295400, 296400, 297300, and 305400. There may be other models that use this part that we do not have listed here. All Briggs and Stratton parts are type number and sometimes code number specific. Please refer to a parts breakdown for your specific model, type, and code numbers to assure that this part will work on your motor. Sorry, but we only have one in stock at this time.