Home/1991 Mercury Grand Marquis Go Free Same Day Shipping 30mm 1991 Mercury Grand Marquis Category Brakes & Wheel Bearing Catalog Brakes Brakes Brake Hardware Brake Rotors Brake Shoes Parking Brake Parts Wheel Hub & Bearings Wheel Hub & Bearings Wheel Bearing & Hub Assemblies Drivetrain Catalog Axle and Driveshaft Axle and Driveshaft Axles and CV-Shafts Transmission Transmission Shifter Parts & Cables Speed Sensor Speedometer Cable Engine & Engine Management Catalog Air Intake Air Intake Air Filter Housing Air Intake Temperature Sensor Engine Sensors & Electrical Engine Sensors & Electrical Coolant Temperature Sensor Distributors Ignition Coils Oil Pressure Switch Starters Tune Up & Maintenance Tune Up & Maintenance Distributor Cap Distributor Rotor Engine Tune Up Kits Oil Filter, Caps & Related Spark Plug Wires Spark Plugs Engine Components Engine Components Engine Parts Oil Pan - Engine Belts and Engine Timing Belts and Engine Timing Harmonic Balancer Idler & Tensioner Pulleys Exterior, Body Parts & Mirrors Catalog Body Sensors Body Sensors Ambient Air Temperature Sensor Body & Frame Body & Frame Battery Trays & Related Weatherstripping Door & Mirror Door & Mirror Door Handle - Exterior Door Lock Actuator & Latches Door Lock Switch Wheel & Tire Wheel & Tire Lug Nut & Wheel Related Wiper System Wiper System Windshield Wiper Blades Fuel & Emissions Catalog Exhaust Exhaust Exhaust Manifold Fuel System Fuel System Fuel Injectors Fuel Pressure Regulator Fuel Pumps & Assemblies Fuel Sending Units Gas / Fuel Tank Straps Gas / Fuel Tanks Emissions & Sensors Emissions & Sensors Idle Air Control Valve MAP Sensor Mass Air Flow Sensor Oxygen Sensors Purge Vent & Evaporative Systems Headlights & Lighting Catalog Headlights & Lighting Headlights & Lighting Headlight Assemblies Heating & Cooling Catalog HVAC HVAC Blower Motor Blower Motor Resistor Heater Core Engine Cooling Engine Cooling Thermostat & Housing Interior Catalog Interior Components Interior Components Auto Carpet Floor Mats & Liners Horns & Horn Parts Electrical & Switches Electrical & Switches Ignition Key Lock Cylinder Ignition Switch Power Window Switch Turn Signal Switches and Levers Door & Window Door & Window Power Window Motor Window Regulator Steering & Suspension Catalog Suspension Suspension Ball Joint Sway Bars, Links, & Bushings Shocks, Struts & Springs Shocks, Struts & Springs Coil Springs Shocks and Struts Steering Steering Idler Arm Power Steering Hoses Power Steering Pump Reservoir Steering Shafts & Couplers Steering Wheels & Column Parts Tie Rods & Adjusting Sleeves Year / Make / Model 1991 Mercury Grand Marquis Brand TRQ Socket Size 30mm 32mm 34mm 35mm 36mm 4mm 5/8 in 7/8 in 9/16 in See all (10) Contact Point Design 12 Point Unit of Measure Metric Socket Type Impact Socket Depth Deep Wall Price $25.00 - $50.00 Filter Results 30mm Enter Vehicle Year Make Model Specify your vehicle's year, make and model to guarantee fit. Year 2025202420232022202120202019201820172016201520142013201220112010200920082007200620052004200320022001200019991998199719961995199419931992199119901989198819871986198519841983198219811980197919781977197619751974197319721971197019691968196719661965196419631962196119601959195819571956195519541953195219511950194919481947194619451944194319421941194019391938193719361935193419331932193119301929192819271926 Make AcuraAlfa RomeoAM GeneralAston MartinAudiBentleyBlue BirdBMWBuickCadillacChevroletChryslerCrane CarrierDatsunDodgeEagleFordFreightlinerGeoGMCHondaHummerHyundaiInfinitiInternationalIsuzuJaguarJeepKenworthKiaLand RoverLexusLincolnLotusMackMazdaMercedes BenzMercuryMitsubishiMitsubishi FusoNissanOldsmobileOshkoshPeterbiltPlymouthPontiacPorscheRolls-RoyceSaabSaturnSpartan MotorsSubaruSuzukiToyotaUD TrucksVolkswagenVolvoWestern Star Model AerostarAspireB600B700BroncoCF7000 TruckCF8000 TruckCrown VictoriaE150 EconolineE150 Econoline Club WagonE250 EconolineE350 EconolineE350 Econoline Club WagonE450 Super DutyEscortExplorerF Super DutyF100 TruckF150 TruckF250 TruckF350 TruckF450 TruckF53F59F600 TruckF700 TruckF800 TruckL-Series Heavy Duty TruckMustangProbeRangerTaurusTempoThunderbird Options Drivetrain Apply 1 Best match first Best match first Price: Low to High Price: High to Low A-Z Z-A 1 1 10 1 Notify When Available Submit VIDEO Socket 2 reviews Brand: TRQ - TLK01008 Socket Depth: Deep Wall Socket Size: 30mm Contact Point Design: 12 Point Socket Drive: 1/2 in. Drive Unit of Measure: Metric Socket Type: Impact $33.95 Save 21% List $42.95 Save $9.00 Add to Cart Close Ship To Zip: Submit