Dorman 610-391 Wheel Lug Stud - Front
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Dorman

Dorman 610-391 Wheel Lug Stud - Front

Brand Dorman 610-391
Position Front
Bolt Grade 8
Color Silver
Head Diameter 0.685 in
Length 2.114
Material Steel
Package Contents 1 Stud
Quick-Start Nose Yes
SAE or Metric SAE
Shoulder Diameter 0.542
Shoulder Length (In) 0.675 in
Splined Bore Diameter 0.561
Style Serrated Stud without Clip Head
Thread Diameter 0.5
Thread Direction Clockwise
Thread Length (In) 1.189 in
Thread Size 1/2-20
Threads Per Inch 20
Fits Ford and Mazda · 47 vehicles

Carbon steel construction. Built for strength, longevity, and safety.

Serrated stud design. Helps deliver a secure, dependable wheel connection.

SAE 1/2-20 thread. Sized for a precise, straightforward replacement fit.

Cross-references Four Seasons 97304, Raybestos Brakes 27881B and BD125852 for the same application. See all 5.

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Not what you need? See all Wheel Lug Stud options

Dorman 610-391 Wheel Lug Stud

Dorman 610-391 is a steel wheel lug stud built for front-wheel applications that call for a 1/2-20 thread size and clockwise thread direction. It is engineered for strength, longevity, and safety in demanding automotive use, making it a direct-fit service part for select Ford Ranger, Ford Explorer, and Mazda truck and SUV applications.

Key Features

  • Steel construction for durable wheel fastening performance
  • 1/2-20 SAE thread size with 20 threads per inch
  • Clockwise thread direction
  • Serrated stud design without clip head
  • Quick-start nose for easier wheel installation alignment
  • Silver finish
  • Grade 8 bolt rating
  • Length: 2.114 in; thread length: 1.189 in

Detailed Description

This Dorman wheel lug stud is made from carbon steel and tested to demanding automotive industry standards to help maintain secure wheel attachment under everyday driving loads. With a 0.5 in thread diameter, 0.542 in shoulder diameter, and 0.561 in splined bore diameter, Dorman 610-391 is built for applications that require precise fitment and dependable clamping force. It cross-references Four Seasons 97304 and Raybestos Brakes 27881B for the same application. Common fitment includes 1983-1997 Ford Ranger, 1991-1994 Ford Explorer, 1984-1990 Ford Bronco II, and select Mazda B2300, B3000, B4000, and Navajo front applications. Dorman 610-391 is a practical replacement when servicing wheel hardware on vehicles that use a 1/2-20 lug stud specification.

What It Helps Address

  • Stripped or damaged wheel stud threads
  • Broken or bent front lug studs
  • Loose wheel retention caused by worn hardware
  • Corrosion-related stud replacement needs
  • Service repairs on Ford Ranger, Ford Explorer, and Mazda front wheel assemblies

Installation Notes and Tips

Verify thread size, shoulder dimensions, and stud length against the original part before installation. This part is listed for front positions only, with fitment varying by vehicle year and configuration. Confirm the vehicle’s hub design and hub-to-stud engagement before pressing the stud into place. For 1987-1988 Ford Bronco and F-150 applications, review the listed hub, axle ratio, and production-date notes carefully to ensure correct application.

Quality Assurance

Dorman manufactures this lug stud to meet demanding automotive industry standards for strength, longevity, and safety. The carbon steel construction and Grade 8 rating support consistent service performance in wheel fastening applications.

This part fits 47 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelDrive TypePositionNotes
1997FordRanger4WDFront10 Wheel Lug Studs with 1/2-20 thread size and 1.189 inch thread length in a box packaging.
1997MazdaB30004WDFront10 Wheel Lug Studs with 1/2-20 thread size and 1.189 inch thread length in a box packaging.
1997MazdaB40004WDFront10 Wheel Lug Studs with 1/2-20 thread size and 1.189 inch thread length in a box packaging.
1996FordRanger4WDFront10 Wheel Lug Studs with 1/2-20 thread size and 1.189 inch thread length in a box packaging.
1996MazdaB23004WDFront10 Wheel Lug Studs with 1/2-20 thread size and 1.189 inch thread length in a box packaging.
1996MazdaB30004WDFront10 Wheel Lug Studs with 1/2-20 thread size and 1.189 inch thread length in a box packaging.
1996MazdaB40004WDFront10 Wheel Lug Studs with 1/2-20 thread size and 1.189 inch thread length in a box packaging.
1995FordRanger4WDFront10 Wheel Lug Studs with 1/2-20 thread size and 1.189 inch thread length in a box packaging.
1995MazdaB23004WDFront10 Wheel Lug Studs with 1/2-20 thread size and 1.189 inch thread length in a box packaging.
1995MazdaB30004WDFront10 Wheel Lug Studs with 1/2-20 thread size and 1.189 inch thread length in a box packaging.
1995MazdaB40004WDFront10 Wheel Lug Studs with 1/2-20 thread size and 1.189 inch thread length in a box packaging.
1994FordExplorer4WDFront10 Wheel Lug Studs with 1/2-20 thread size and 1.189 inch thread length in a box packaging.
1994FordRanger4WDFront10 Wheel Lug Studs with 1/2-20 thread size and 1.189 inch thread length in a box packaging.
1994MazdaB30004WDFront10 Wheel Lug Studs with 1/2-20 thread size and 1.189 inch thread length in a box packaging.
1994MazdaB40004WDFront10 Wheel Lug Studs with 1/2-20 thread size and 1.189 inch thread length in a box packaging.
1994MazdaNavajo4WDFront10 Wheel Lug Studs with 1/2-20 thread size and 1.189 inch thread length in a box packaging.
1993FordExplorer4WDFront10 Wheel Lug Studs with 1/2-20 thread size and 1.189 inch thread length in a box packaging.
1993FordRanger4WDFront10 Wheel Lug Studs with 1/2-20 thread size and 1.189 inch thread length in a box packaging.
1993MazdaNavajo4WDFront10 Wheel Lug Studs with 1/2-20 thread size and 1.189 inch thread length in a box packaging.
1992FordExplorer4WDFront10 Wheel Lug Studs with 1/2-20 thread size and 1.189 inch thread length in a box packaging.
1992FordRanger4WDFront10 Wheel Lug Studs with 1/2-20 thread size and 1.189 inch thread length in a box packaging.
1992MazdaNavajo4WDFront10 Wheel Lug Studs with 1/2-20 thread size and 1.189 inch thread length in a box packaging.
1991FordExplorer4WDFront10 Wheel Lug Studs with 1/2-20 thread size and 1.189 inch thread length in a box packaging.
1991FordRanger4WDFront10 Wheel Lug Studs with 1/2-20 thread size and 1.189 inch thread length in a box packaging.
1991MazdaNavajo—Front10 Wheel Lug Studs with 1/2-20 thread size and 1.189 inch thread length in a box packaging.
1990FordBronco II4WDFront10 Wheel Lug Studs with 1/2-20 thread size and 1.189 inch thread length in a box packaging.
1990FordRanger4WDFront10 Wheel Lug Studs with 1/2-20 thread size and 1.189 inch thread length in a box packaging.
1989FordBronco—FrontManual Locking Hubs; w/3.54 Axle Ratio; w/Heavy Duty Front End or Snow Plow Package; Package Quantity: 10; Thread Size: 1/2-20; Packaging Type: Box; Thread Length (In): 1.189 in
1989FordBronco II4WDFront10 Wheel Lug Studs with 1/2-20 thread size and 1.189 inch thread length in a box packaging.
1989FordRanger4WDFront10 Wheel Lug Studs with 1/2-20 thread size and 1.189 inch thread length in a box packaging.
1988FordBronco—FrontManual Locking Hubs; To 4/30/88; Package Quantity: 10; Thread Size: 1/2-20; Packaging Type: Box; Thread Length (In): 1.189 in
1988FordBronco II4WDFront10 Wheel Lug Studs with 1/2-20 thread size and 1.189 inch thread length in a box packaging.
1988FordF-1504WDFrontManual Locking Hubs; From 3/01/88; To 4/30/88; Package Quantity: 10; Thread Size: 1/2-20; Packaging Type: Box; Thread Length (In): 1.189 in
1988FordF-1504WDFrontManual Locking Hubs; To 2/29/88; w/3.54 Axle Ratio; w/4.09 Axle Ratio; Package Quantity: 10; Thread Size: 1/2-20; Packaging Type: Box; Thread Length (In): 1.189 in
1988FordRanger4WDFront10 Wheel Lug Studs with 1/2-20 thread size and 1.189 inch thread length in a box packaging.
1987FordBronco—FrontManual Locking Hubs; Package Quantity: 10; Thread Size: 1/2-20; Packaging Type: Box; Thread Length (In): 1.189 in
1987FordBronco II4WDFront10 Wheel Lug Studs with 1/2-20 thread size and 1.189 inch thread length in a box packaging.
1987FordF-1504WDFrontManual Locking Hubs; w/3.54 Axle Ratio; w/4.09 Axle Ratio; Package Quantity: 10; Thread Size: 1/2-20; Packaging Type: Box; Thread Length (In): 1.189 in
1987FordRanger4WDFront10 Wheel Lug Studs with 1/2-20 thread size and 1.189 inch thread length in a box packaging.
1986FordBronco II4WDFront10 Wheel Lug Studs with 1/2-20 thread size and 1.189 inch thread length in a box packaging.
1986FordRanger4WDFront10 Wheel Lug Studs with 1/2-20 thread size and 1.189 inch thread length in a box packaging.
1985FordBronco—FrontAutomatic Locking Hubs; w/4.10 Axle Ratio; Package Quantity: 10; Thread Size: 1/2-20; Packaging Type: Box; Thread Length (In): 1.189 in
1985FordBronco II—Front10 Wheel Lug Studs with 1/2-20 thread size and 1.189 inch thread length in a box packaging.
1985FordRanger4WDFront10 Wheel Lug Studs with 1/2-20 thread size and 1.189 inch thread length in a box packaging.
1984FordBronco II—Front10 Wheel Lug Studs with 1/2-20 thread size and 1.189 inch thread length in a box packaging.
1984FordRanger4WDFront10 Wheel Lug Studs with 1/2-20 thread size and 1.189 inch thread length in a box packaging.
1983FordRanger4WDFront10 Wheel Lug Studs with 1/2-20 thread size and 1.189 inch thread length in a box packaging.
Directly replaces or cross-references 5 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Four Seasons — 97304Raybestos Brakes — 27881BBD125852E3TZ1107BZZL033062A