Headlight Adjusting Screw Dorman M10 Flat Head Steel Set 2-Pack

Description

Product Overview

The Dorman M10 flat head steel screw is engineered as a precise, direct replacement for the original headlight adjusting screw found in a wide range of automotive lighting assemblies. Crafted from high‑grade steel, the screw features a fully threaded M10 x 12 mm metric profile that delivers consistent torque transfer and reliable positioning for headlamp adjustment mechanisms. Its flat head design, combined with a machined exterior finish, provides a low‑profile surface that sits flush against the surrounding housing, reducing the risk of interference with adjacent components.

Measuring 1.6 × 3.2 × 2.2 inches and weighing just 0.352 ounces, the screw is compact yet robust, offering the perfect balance of strength and ease of handling. The part carries the Dorman model number 42161 and is listed under multiple OEM part numbers—including 421612, 15714775, 557057, and 559312—ensuring compatibility with a broad spectrum of vehicle makes and models. The fully threaded M10 × 10 mm configuration aligns with a compatible groove diameter of 10 mm, delivering a secure, fully engaged fit that mirrors factory specifications.

Installation is straightforward for both seasoned technicians and confident DIYers. The metric thread type (2A class) guarantees a tight, vibration‑resistant connection, while the flat point style simplifies alignment during the adjustment process. No special tools beyond a standard M10 socket or screwdriver are required, making the part an accessible solution for quick repairs or comprehensive headlamp overhauls. The screw’s black coating not only matches the aesthetic of most headlamp assemblies but also provides an added layer of corrosion resistance for long‑term durability.

Dorman backs this component with the expertise of a company that has served the automotive aftermarket for more than a century. Each screw undergoes rigorous quality testing in the United States, ensuring that the finished product meets exacting standards for fit, function, and longevity. The 2‑pack packaging offers value and convenience, allowing users to keep a spare on hand for future maintenance or to replace multiple screws in a single service visit.

Usage

This adjusting screw is ideal for restoring headlamp alignment on passenger cars, light trucks, and SUVs that rely on precision‑engineered adjustment mechanisms. Whether you are correcting a misaligned beam after a collision repair, replacing a broken screw during a routine service, or upgrading an older vehicle to meet current lighting standards, the Dorman M10 screw provides the exact fit and function required for accurate positioning.

Professional service centers appreciate the part’s consistency and ease of installation, allowing technicians to complete headlamp adjustments within standard labor timeframes. At the same time, hobbyist mechanics benefit from the clear labeling, straightforward dimensions, and the confidence that comes from using a component that matches the original equipment manufacturer’s specifications. The screw’s metric thread and flat head design make it compatible with a variety of adjustment tools, from torque wrenches to simple hand drivers, ensuring flexibility across different workshop environments.

Beyond standard headlamp assemblies, the screw can also be employed in aftermarket lighting projects, such as custom LED retrofit kits or performance headlamp upgrades, where precise alignment is critical for optimal illumination and safety. Its durable steel construction stands up to the thermal cycles and vibration typical of modern vehicles, providing a reliable anchor point for both stock and modified lighting solutions.

Why Choose Us

Dorman’s reputation in the automotive parts industry is built on a foundation of engineering excellence and a commitment to customer satisfaction. With more than 100 years of experience, the company leverages deep technical knowledge to develop components that meet or exceed original equipment standards. This heritage translates into a product that not only fits perfectly but also delivers the durability required for long‑term service life.

Each screw is manufactured in a controlled environment where material composition, thread geometry, and surface finish are meticulously monitored. The result is a component that resists fatigue, corrosion, and wear, even in demanding climates. Dorman’s quality assurance process includes dimensional verification, torque testing, and visual inspection, ensuring that every unit leaving the factory is ready for immediate installation without additional machining or modification.

Customer support is a cornerstone of the Dorman experience. A dedicated team of product experts based in the United States is available to answer fitment questions, provide installation guidance, and assist with any warranty concerns. This level of service gives both professional installers and DIY enthusiasts the confidence that they are backed by a knowledgeable partner throughout the life of the product.

Key Features

• Durable steel construction ensures long‑lasting performance and resistance to wear.
• Fully threaded M10 metric profile provides a secure, vibration‑proof fit.
• Flat head design sits flush, preventing interference with surrounding components.
• Easy installation with standard M10 tools saves time for both professionals and DIYers.
• Backed by U.S. based product experts and a century of automotive experience for reliable support.

FAQ

What vehicles are compatible with this screw?

The Dorman M10 flat head screw matches the OEM part numbers 421612, 15714775, 557057, and 559312, covering a broad range of makes and models that use a metric M10 headlight adjusting screw. Compatibility lists are available on the Dorman website, and you can also enter your vehicle’s year, make, and trim into the garage tool to confirm fit.

How do I install the screw correctly?

Begin by removing the headlamp assembly and locating the existing adjusting screw hole. Insert the new M10 screw using a standard M10 socket or screwdriver, applying even pressure until the screw is fully seated. Tighten to the manufacturer’s torque specification—typically around 5‑7 Nm—to ensure a secure fit without over‑compressing the threads. Re‑assemble the headlamp and perform a beam alignment check.

What tools are required for installation?

Only basic hand tools are needed: an M10 socket or screwdriver, a torque wrench for precise tightening, and a trim removal tool if the headlamp housing must be accessed. No special equipment or additional adapters are required, making the part suitable for both professional workshops and home garages.

Is there a warranty on this product?

Yes. Dorman provides a limited warranty that covers defects in material and workmanship for a period of one year from the date of purchase. If the screw fails due to manufacturing issues, Dorman will replace it at no additional cost. Contact Dorman customer support with your purchase details to initiate a warranty claim.

Can this screw be used in aftermarket lighting upgrades?

Absolutely. The screw’s metric thread and flat head design make it compatible with many aftermarket headlamp kits, including LED and HID conversions. Its robust construction ensures it can handle the additional heat and vibration that sometimes accompany high‑performance lighting systems, providing a reliable mounting point for upgraded illumination solutions.