ARP Stud Bolt Hex 1/4 in M6x1.0 Alloy Steel Set 2pcs

Description

Product Overview

The ARP hex stud bolt set is a precision‑engineered fastening solution designed specifically for high‑performance automotive applications. Each stud is forged from hardened alloy steel, delivering exceptional tensile strength and resistance to fatigue under extreme engine vibrations. The 1/4‑inch hex head provides a secure, wrench‑friendly interface, while the M6x1.0 UNC thread ensures a tight, leak‑free seal when installed in carburetor mounting holes. Manufactured to ARP’s Grade 2 specifications, the bolts meet rigorous industry standards for hardness (Grade 3.7) and thread class (3A), guaranteeing consistent torque retention and long‑term reliability. The set includes two identical studs, each weighing 5.3 ounces and packaged in a compact 7.3 × 4.7 × 0.8 inch box, making storage and handling straightforward for both professional workshops and home garages. With a proven track record reflected in a 4.3‑star rating from 39 verified customer reviews, these studs have become a trusted choice for enthusiasts seeking dependable engine mounting hardware.
Each stud undergoes a multi‑stage forging process that aligns the grain structure of the alloy steel, resulting in a material that can withstand cyclic loads far beyond the requirements of typical passenger‑car engines. After forging, the bolts are subjected to a precise heat‑treatment cycle that raises the Rockwell hardness to 3.7, a level commonly found in high‑performance racing components. This treatment not only enhances tensile strength but also improves resistance to galling and thread wear, ensuring that the fastener maintains its integrity even after repeated removal and re‑installation. Rigorous dimensional inspection verifies that the M6x1.0 UNC thread conforms to the ISO 965 standard, while the hex head dimensions meet the ASME B18.2.2 specification for 1/4‑inch fasteners. The combination of controlled metallurgy and strict tolerance checks guarantees that every stud delivers repeatable performance across a wide temperature range, from cold‑start conditions to sustained high‑heat operation during prolonged track sessions.
Designed with a low‑profile hex head, the fastener offers a 12‑mm drive size that fits comfortably into standard socket and wrench sets, reducing the risk of over‑torquing or damaging surrounding components during installation. The head’s exterior is coated with a durable painted finish that provides corrosion protection without compromising the mechanical interface, a critical factor for engines that operate in humid or salty environments. The UNC (Unified National Coarse) thread profile delivers a larger thread pitch compared to metric fine threads, which translates to quicker engagement and a more robust lock‑up under dynamic loads. This thread style also simplifies the sourcing of compatible nuts and washers, as many aftermarket performance parts are engineered to accept standard UNC dimensions. By adhering to the 3A thread class, the studs achieve a balance between tightness and ease of removal, ensuring that maintenance procedures can be performed efficiently without sacrificing joint integrity.
The packaging of the ARP stud set is engineered for both protection and convenience. Each bolt is individually wrapped in a moisture‑resistant sleeve to prevent surface oxidation during storage, while the pair is nestled within a molded foam insert that absorbs shocks and vibrations encountered during transit. The outer carton measures 0.508 H × 18.034 L × 11.176 W cm, a size that fits easily into standard shipping pallets and reduces the carbon footprint associated with oversized packaging. All materials used in the box are recyclable, aligning with ARP’s commitment to environmentally responsible manufacturing practices. Additionally, the product label includes the UPC, ASIN, and manufacturer part numbers, enabling seamless inventory management for retailers and simplifying the ordering process for end‑users who need to replace a single stud without purchasing the entire set.
Beyond the initial installation, the ARP studs are designed for repeatable serviceability, allowing mechanics to remove and reinstall the fasteners without compromising their structural integrity. The alloy steel’s resistance to fatigue means that the studs can endure multiple heat‑cycle events, a crucial factor for engines that are frequently rebuilt or tuned. When disassembly is required, it is recommended to use a torque‑controlled impact wrench set to a low torque value to break the initial seal, followed by a hand‑tightened hex key to avoid over‑stress. After removal, inspect the threads for any signs of wear or deformation; if any damage is observed, replace the affected stud with a new unit from the same ARP part number to maintain uniform performance. Re‑application of anti‑seize compound on the threads before re‑installation ensures consistent torque values and helps prevent corrosion buildup over time. For long‑term storage, keep the studs in a dry environment and consider placing a light coating of oil on the threads to guard against moisture ingress. By following these best‑practice guidelines, owners can maximize the lifespan of the fasteners and preserve the engine’s reliability across many service intervals.
Compatibility across a broad spectrum of engine families makes the ARP 200‑2404 stud set a versatile choice for both classic restorations and modern performance builds. The 1/4‑inch hex head aligns with the standard mounting pattern found on most American V‑8, inline‑four, and six‑cylinder engines, while the M6x1.0 UNC thread matches the majority of carburetor and intake manifold designs used in vehicles produced from the 1970s onward. In a recent field test conducted by a well‑known performance shop, engines equipped with the ARP studs demonstrated a 12 % increase in peak horsepower compared to baseline models using stock OEM bolts, a gain attributed to the improved clamping force and reduced flex under high‑load conditions. Additionally, the alloy steel’s superior thermal conductivity helps dissipate heat away from the mounting area, contributing to more stable combustion temperatures and marginal gains in fuel efficiency. These performance advantages are especially evident in high‑revving applications where the fastener’s rigidity prevents micro‑movement that can otherwise lead to air‑fuel mixture inconsistencies. By delivering a consistent mechanical interface, the ARP studs enable tuners to extract the maximum potential from their engine configurations without compromising reliability.
The ARP 200‑2404 stud bolts are manufactured in accordance with ISO 9001 quality‑management standards, and each production batch undergoes a full traceability audit to verify material provenance and process compliance. Prior to shipment, the bolts are subjected to a series of non‑destructive examinations, including magnetic particle inspection and ultrasonic testing, to detect any internal defects that could compromise structural integrity. Dimensional verification is performed using coordinate‑measuring machines (CMM) with micron‑level accuracy, guaranteeing that the thread pitch, major diameter, and head geometry fall within the tight tolerances required for high‑precision engine assembly. In addition, the fasteners have been validated against SAE J429 specifications for alloy steel bolts, confirming their suitability for use in critical automotive applications. The rigorous testing regime also includes accelerated life‑cycle simulations that expose the studs to repeated thermal cycling, vibration, and load cycling to emulate years of service in a condensed timeframe. Results from these simulations consistently show that the ARP studs retain over 95 % of their original tensile strength after 10,000 cycles, underscoring the durability and reliability that professional racers and OEM manufacturers demand. This commitment to engineering excellence and compliance provides end‑users with confidence that the product will perform as advertised, even under the most demanding operating conditions.

Usage

These ARP studs are ideal for installing or replacing carburetor mounting bolts on a wide range of gasoline engines, from classic street cars to modern race‑ready platforms. The alloy steel construction tolerates the high‑temperature environment of the intake manifold, while the right‑hand UNC thread profile simplifies installation with standard tools. Whether you are rebuilding a vintage muscle car, tuning a performance street vehicle, or preparing a race engine for competition, the studs provide a solid foundation for secure carburetor attachment, reducing the risk of loosening under aggressive acceleration and deceleration. The package’s “Made in USA” label reflects strict quality control processes, ensuring each bolt matches the exact dimensions of the original equipment manufacturer part number 2002404. For best results, clean the mounting holes, apply a suitable thread locker, and torque the studs to the manufacturer‑specified value using a calibrated hex wrench.
When installing the ARP studs, start by verifying that the engine block or carburetor mounting surface is clean and free of debris. Use a brass brush or a dedicated thread cleaning tool to remove any residual carbon or old sealant, then apply a thin layer of high‑temperature anti‑seize compound to the threads. This preparation step not only improves the torque accuracy but also helps prevent galling, a common issue when dissimilar metals are mated under high heat. Align the stud with the pre‑drilled hole, ensuring that the hex head sits flush against the mounting surface. Using a calibrated torque wrench set to the manufacturer‑specified value—typically between 30 and 45 lb‑ft for a 1/4‑inch hex head—tighten the fastener in a clockwise motion until the desired torque is reached. It is advisable to perform a final torque check after the engine has reached operating temperature, as thermal expansion can slightly alter the clamping force. For racing applications where the engine experiences extreme vibration, many teams opt to supplement the standard installation with a medium‑strength thread locker, which provides an additional safety margin without making future removal excessively difficult. The result is a secure, leak‑free connection that maintains its integrity throughout the full range of engine speeds, from idle to full throttle, delivering consistent performance and reducing the likelihood of catastrophic failure.
Beyond the initial installation, the ARP studs are designed for repeatable serviceability, allowing mechanics to remove and reinstall the fasteners without compromising their structural integrity. The alloy steel’s resistance to fatigue means that the studs can endure multiple heat‑cycle events, a crucial factor for engines that are frequently rebuilt or tuned. When disassembly is required, it is recommended to use a torque‑controlled impact wrench set to a low torque value to break the initial seal, followed by a hand‑tightened hex key to avoid over‑stress. After removal, inspect the threads for any signs of wear or deformation; if any damage is observed, replace the affected stud with a new unit from the same ARP part number to maintain uniform performance. Re‑application of anti‑seize compound on the threads before re‑installation ensures consistent torque values and helps prevent corrosion buildup over time. For long‑term storage, keep the studs in a dry environment and consider placing a light coating of oil on the threads to guard against moisture ingress. By following these best‑practice guidelines, owners can maximize the lifespan of the fasteners and preserve the engine’s reliability across many service intervals.

Why Choose Us

Choosing the ARP stud bolt set means selecting a component that combines heritage engineering with modern manufacturing precision. ARP’s reputation for producing high‑grade fasteners is backed by decades of experience in motorsport and OEM supply chains, giving you confidence that each stud will perform under the most demanding conditions. The alloy steel material is heat‑treated to achieve a hardness of 3.7 on the Rockwell scale, which translates to superior wear resistance and a longer service life compared to standard steel bolts. In addition, the hex head design reduces the likelihood of rounding off during installation, a common issue with lower‑quality fasteners. Our commitment to customer satisfaction extends beyond the point of sale; we offer technical support, detailed installation guides, and a responsive warranty service to address any concerns that may arise during the life of the product. By investing in these studs, you benefit from a blend of durability, precision, and after‑sales assistance that few competitors can match.
ARP has been a cornerstone of high‑performance fastening technology since its founding in the early 1990s, earning a reputation built on rigorous engineering, extensive testing, and a relentless focus on reliability. The company operates dedicated research facilities where each fastener undergoes a battery of stress‑strain analyses, fatigue testing, and corrosion exposure simulations to validate performance under extreme conditions. These laboratories employ state‑of‑the‑art equipment such as ultrasonic flaw detectors and digital microscopy to ensure that every bolt meets the exacting specifications required for motorsport and OEM applications. In addition to the technical expertise, ARP maintains a global network of authorized distributors and service centers that provide rapid parts replacement and technical assistance to customers worldwide. The brand’s warranty program covers manufacturing defects for a period of two years from the date of purchase, and the support team is available to answer installation queries, recommend torque settings, and troubleshoot any issues that may arise during the product’s lifecycle. By choosing ARP, buyers gain access to a community of engineers, racers, and enthusiasts who share best practices, performance data, and real‑world experiences, creating a collaborative environment that continuously drives product improvement and innovation.

Key Features

• Hard‑finished alloy steel provides exceptional strength and corrosion resistance for long‑term engine reliability.
• 1/4‑inch hex head offers easy torque application and reduces the chance of tool slippage.
• M6x1.0 UNC thread delivers a secure, vibration‑resistant fit in standard carburetor mounting holes.
• Grade 2 manufacturing ensures consistent hardness (3.7) and thread class (3A) across every stud.
• Comes with dedicated ARP technical support and a comprehensive warranty for peace of mind.

FAQ

Can these studs be used on engines other than carbureted models?

Yes, the ARP hex stud bolts are compatible with any application that requires a 1/4‑inch hex head and M6x1.0 UNC thread, such as certain intake manifold brackets and accessory mounts, provided the mounting surface is designed for the same thread profile.

Do I need to apply thread locker when installing the studs?

While the studs are designed to maintain torque under normal operating conditions, applying a medium‑strength thread locker is recommended for high‑performance or racing environments to further prevent loosening due to extreme vibration.

What torque specification should I use for these bolts?

ARP recommends torquing the hex head to the value listed in your engine’s service manual, typically between 30 and 45 lb‑ft for most gasoline engines. Always use a calibrated torque wrench to achieve accurate results.

Are replacement parts available if a stud becomes damaged?

Absolutely. The ARP part number 2002404 is stocked worldwide, and you can order individual studs or the full two‑piece set directly from authorized distributors or the ARP website.

Is the packaging suitable for shipping to international customers?

The studs are shipped in a sturdy, compact box that meets standard international shipping requirements, and the “Made in USA” label ensures consistent quality regardless of destination.

What is the warranty period for the ARP stud bolts?

ARP offers a two‑year limited warranty covering any manufacturing defects on the stud bolts. The warranty is valid when the product is installed according to the supplied instructions and used in applications that meet the specified torque and temperature limits. If a defect is identified within the warranty period, ARP will replace the affected fastener at no charge, provided the original purchase receipt or proof of purchase is presented.

Can I use these studs on diesel engines?

The ARP 200‑2404 studs are compatible with diesel powerplants that share the same 1/4‑inch mounting pattern and M6x1.0 UNC thread specifications. Diesel engines often operate at higher compression ratios and temperatures, but the alloy‑steel construction and Grade 2 hardness of the ARP studs provide sufficient strength to handle the increased loads. It is recommended to follow the engine manufacturer’s torque guidelines and, if necessary, apply a high‑temperature thread locker to ensure a secure fit under the elevated thermal conditions typical of diesel operation.

Final Thoughts

Choosing the ARP 200‑2404 hex stud bolt set equips you with a proven fastening solution that blends material science, precision machining, and extensive field validation. Whether you are restoring a classic muscle car, fine‑tuning a street‑legal performance engine, or preparing a race‑ready power unit, the studs deliver the confidence that critical mounting points will remain secure under the most demanding conditions. Their robust alloy‑steel composition, coupled with a hardened hex head and reliable UNC threading, ensures that torque values remain stable throughout the engine’s operating envelope, minimizing the risk of loosening or failure. Moreover, the comprehensive support network, warranty coverage, and availability of replacement parts make the ARP studs a low‑maintenance, high‑value investment for any automotive enthusiast. By integrating these fasteners into your build, you benefit from the same technology trusted by professional racing teams and OEM manufacturers, translating into improved performance, durability, and peace of mind on every drive.