Secure your assembly with precision-engineered hardware from ARP. This 5-pack of M10 x 1.25 x 35mm hex head bolts (MPN 663-1004) provides reliable fastening for critical automotive components. The black oxide finish offers a professional appearance and serves as a protective layer against corrosion in various engine, drivetrain, or chassis applications.

• Manufacturer Part Number: 663-1004
• Thread Size: M10 x 1.25
• Under Head Length: 35mm
• Head Style: Standard Hex
• Finish: Black Oxide
• Quantity: Package of 5 bolts

Secure your components with the strength and precision of ARP hex head fasteners. This 5-pack of bolts is designed for automotive applications requiring a reliable M10 x 1.25 thread pitch with a 30mm under-head length. Finished in a durable black oxide, these fasteners offer improved corrosion resistance and a professional appearance for engine accessories, brackets, or general chassis use.

• Thread Size: M10 x 1.25
• Under-Head Length: 30mm
• Head Style: Hex
• Finish: Black Oxide
• Package Quantity: 5 Bolts
• Manufacturer Part Number: 663-1003

Upgrade your vehicle's hardware with the ARP 663-1002 metric hex bolts, designed to provide superior clamping force and reliability compared to standard OE fasteners. These high-strength bolts are ideal for accessory mounts, brackets, and general automotive assembly where precise tolerances and durability are required.

• Thread Size: M10 x 1.25
• Underhead Length: 25mm
• Wrenching: Hex Head
• Material/Finish: High-quality construction with a corrosion-resistant Black Oxide finish
• Manufacturer Part Number: 663-1002

ARP fasteners are the industry standard for performance applications, offering the fatigue resistance and tensile strength necessary for high-stress environments. These bolts serve as a direct replacement for worn or inferior grade-8.8/10.9 hardware, ensuring a secure and professional installation.

Upgrade your hardware with the strength and precision of ARP 662-1008 hex head bolts. Designed for demanding automotive applications where standard fasteners may fail, these M10 x 1.50 bolts provide the reliability expected from a leader in high-performance racing fasteners. The black oxide finish offers a durable layer of corrosion resistance, making them ideal for both engine and chassis use.

• Manufacturer Part Number: 662-1008
• Thread Pitch: M10 x 1.50
• Under Head Length (UHL): 60mm
• Head Style: Hex head
• Finish: Black Oxide
• Quantity: Pack of 5

Whether you are securing accessories or assembling critical components, these bolts are manufactured to exacting tolerances to ensure consistent torque loading and superior tensile strength.

Upgrade your hardware with these high-strength metric fasteners from ARP. These M10 x 1.50 bolts feature a standard external hex head and are engineered for reliable clamping force in demanding automotive applications. Each bolt is finished with a durable black oxide coating for corrosion resistance and a professional appearance under the hood or chassis.

• Manufacturer Part Number: 662-1006
• Thread Size: M10 x 1.50
• Under-Head Length: 45mm
• Head Style: Hex
• Finish: Black Oxide
• Package Quantity: 5 Bolts

Secure your components with the professional-grade strength of ARP M8 x 1.25 x 16mm hex head bolts. These high-performance fasteners are engineered for automotive applications requiring superior tensile strength and reliability compared to standard hardware. Finished in a durable black oxide coating, they provide a clean, professional appearance while offering corrosion resistance for engine and chassis environments.

This 5-pack is ideal for securing bracketry, accessories, or small components where precision clamping force and thread integrity are essential. Each bolt features a hex head for easy installation with standard tools and is manufactured to ARP's strict quality standards.

• Thread Size: M8 x 1.25
• Under-Head Length: 16mm
• Head Style: Hex
• Finish: Black Oxide
• Quantity: 5-Pack
• Manufacturer Part Number: 661-1017

Secure your critical components with the precision and strength of ARP 661-1014 M8 x 1.25 x 90mm hex head bolts. Designed for high-stress automotive applications, these fasteners provide a significant upgrade over standard hardware, offering the reliability needed for engine accessories, chassis components, and custom fabrication projects. ARP's manufacturing process ensures consistent thread engagement and superior tensile strength to handle the demands of performance driving.

These bolts are treated with a durable black oxide finish, providing a clean, professional appearance under the hood while offering resistance to corrosion. The precision-machined hex head allows for stable wrenching and accurate torque application, making them a staple for any builder who demands professional-grade hardware.

• Manufacturer Part Number: 661-1014
• Thread Size: M8 x 1.25
• Under Head Length: 90mm
• Head Style: Hex
• Material Finish: Black Oxide
• High-strength replacement for OE fasteners

Ensure superior fastening reliability with this 5-pack of ARP metric hex head bolts. Precision-machined for consistent torque loading and structural integrity, these fasteners are designed to replace standard hardware in demanding automotive applications. The durable black oxide finish provides essential corrosion resistance and a clean, professional appearance for engine or chassis assembly.

• Thread Size: M8 x 1.25
• Under Head Length (UHL): 55mm
• Head Style: Hex
• Finish: Black Oxide
• Package Quantity: 5 Bolts
• Manufacturer Part Number: 661-1008

This 5-pack of ARP high-strength fasteners provides the reliability and precision required for demanding automotive assemblies. These M8 x 1.25 bolts feature a 50mm underhead length and a traditional hex head design, making them an ideal choice for various engine, chassis, or accessory mounting applications where superior clamping force is required over standard hardware.

Manufactured from premium alloy with a protective black oxide finish, these bolts are designed to resist corrosion while maintaining tight tolerances. As a staple in professional racing and high-performance street builds, ARP fasteners are engineered to withstand higher stresses than typical OE-grade bolts.

• Brand: ARP
• Part Number: 661-1007
• Thread Size: M8 x 1.25
• Underhead Length: 50mm
• Head Style: Hex Head
• Finish: Black Oxide
• Quantity: 5 Bolts per package

This 5-pack of ARP black oxide hex bolts (MPN 661-1004) provides a high-strength fastening solution for critical automotive assemblies. Designed for durability and precision, these bolts feature a standard hex head and are ideal for securing accessories, brackets, or components requiring an M8 fastener. The black oxide finish offers a clean look and resistance to corrosion in demanding environments.

• Manufacturer: ARP
• Part Number: 661-1004
• Thread Size: M8 x 1.25
• Underhead Length: 35mm
• Head Style: Hex
• Finish: Black Oxide
• Package Quantity: 5 Bolts

Secure your components with the precision and strength of ARP hex bolts. This 5-pack of M8 x 1.25 x 30mm fasteners is engineered to replace inferior hardware in high-stress automotive environments. Whether you are mounting accessories, brackets, or engine covers, these bolts provide the consistent clamping force and thread integrity required for performance builds.

Each fastener features a durable black oxide finish for a professional look and moderate corrosion resistance. These bolts are designed with a traditional hex head for easy installation with standard tools and are manufactured to ARP's strict tolerances for reliability.

• Manufacturer Part Number: 661-1003
• Thread Size: M8 x 1.25
• Underhead Length: 30mm
• Head Style: Hex
• Finish: Black Oxide
• Quantity: 5 Bolts per Package

Secure your assembly with precision-engineered ARP M8 x 1.25 x 25mm hex bolts. These high-strength fasteners are designed for demanding automotive applications where standard hardware may lack the necessary tolerances. Featuring a durable black oxide finish, these bolts provide a professional appearance and reliable performance for engine accessories, brackets, or chassis components.

• Manufacturer Part Number: 661-1002
• Thread Size: M8 x 1.25
• Underhead Length: 25mm
• Head Style: Hex
• Finish: Black Oxide
• Package Quantity: 5 Bolts

Each fastener is manufactured to ARP's strict quality standards, ensuring consistent thread engagement and clamping force across the entire set. Ideal for various mounting tasks where a 25mm length and M8 metric thread are required.

Secure your components with the professional-grade strength of ARP Black Oxide Hex Bolts (MPN 660-1017). These high-performance M6 x 1.00 fasteners are manufactured from 8740 chrome moly steel, heat-treated to a 170,000 psi tensile strength rating. This makes them significantly stronger than standard Grade 8 or metric 10.9 hardware, ensuring they can withstand the rigors of high-vibration automotive environments.

Each bolt features a precision-machined hex head for reliable wrenching and a durable black oxide finish that provides both corrosion resistance and a clean, finished look in the engine bay. These are ideal for accessories, brackets, and general-purpose fastening where fastener failure is not an option.

• Thread Size: M6 x 1.00
• Under Head Length (UHL): 16mm
• Material: 8740 Chrome Moly Steel
• Tensile Strength: 170,000 psi
• Finish: Black Oxide
• Head Style: Hex
• Quantity: 5 per package
• Manufacturer Part Number: 660-1017

Secure your components with the precision and strength of ARP fasteners. This 5-pack of M6 x 1.00 hex head bolts (MPN 660-1006) is engineered for automotive applications that demand higher tensile strength and tighter tolerances than standard hardware. Whether you are mounting accessories, securing brackets, or completing an engine dress-up, these bolts provide the reliability professional builders expect.

Each bolt features a 45mm under-head length and is finished in a durable black oxide coating. This finish provides a clean, professional appearance while offering resistance to corrosion in non-harsh environments. The traditional hex head design ensures compatibility with standard sockets and wrenches for straightforward installation.

• Manufacturer Part Number: 660-1006
• Thread Size: M6 x 1.00
• Under Head Length: 45mm
• Head Style: External Hex
• Material Finish: Black Oxide
• Package Quantity: 5 Bolts

Engineered for applications requiring superior tensile strength and precision, these ARP 660-1005 hex bolts are a professional upgrade over standard hardware. Each M6 x 1.00 fastener features a 40mm underhead length, specifically designed for secure clamping in automotive accessory and structural assemblies. The black oxide treatment provides a clean, uniform finish and essential corrosion resistance for long-term durability in various environments.

• Manufacturer Part Number: 660-1005
• Thread Size: M6 x 1.00
• Underhead Length: 40mm
• Head Style: Traditional Hex
• Material Finish: Black Oxide
• Package Quantity: 5 Bolts

These ARP high-performance fasteners provide a significant strength upgrade over standard Grade 8 or OE hardware. Rated at 180,000 psi tensile strength, these bolts are precision-machined from 8740 chrome moly steel to handle the demanding loads of performance automotive applications, including engine dress-up and accessory mounting.

• Thread Size: M6 x 1.00
• Under Head Length (UHL): 30mm
• Head Style: Traditional Hex
• Material: 8740 Chrome Moly Steel
• Finish: Corrosion-resistant Black Oxide
• Tensile Strength: 180,000 psi
• Quantity: Pack of 5 bolts
• Manufacturer Part Number: 660-1003

Each bolt is heat-treated and thread-rolled after heat treatment to ensure maximum fatigue strength. The black oxide finish offers a professional aesthetic for clean engine bays while providing essential protection against the elements.

These ARP hex head bolts are engineered for high-strength fastening in various automotive and mechanical applications. Designed to meet the rigorous demands of professional builders, these fasteners provide a superior alternative to standard hardware, ensuring more consistent torque loading and improved durability.

Each bolt features a precision-machined thread and a resilient black oxide finish for a professional appearance and enhanced corrosion resistance. This package is ideal for securing engine accessories, brackets, and other components requiring a reliable M6 fastener.

• Manufacturer Part Number: 660-1001
• Thread Size: M6 x 1.00
• Underhead Length: 20mm
• Head Style: Hex
• Material Finish: Black Oxide
• Quantity: 5 bolts per package

These ARP Stainless Steel bolts provide a high-strength, corrosion-resistant solution for critical automotive assemblies. Rated at a 170,000 psi tensile strength—significantly stronger than standard Grade 8 hardware—these fasteners are designed to withstand the rigors of high-performance environments while maintaining a show-quality polished finish. The precision-machined 1/2-13 threads and hex head design ensure accurate torque application and reliable tool engagement during installation.

• Manufactured from ARP's proprietary Stainless 300 alloy for maximum durability and rust resistance.
• Ideal for accessory mounts, brackets, and general high-performance fastening where aesthetics and strength are required.
• Precision-rolled threads prevent galling and ensure consistent clamping force.
• Includes five (5) bolts per package.

• Thread Size: 1/2-13
• Underhead Length: 2.750 in
• Head Style: Hex
• Material: Stainless Steel 300
• Tensile Strength: 170,000 psi
• Quantity: 5-Pack
• Manufacturer Part Number: 646-2750

Secure your assembly with the precision and strength of ARP 643-1500 fasteners. These 7/16-14 bolts feature a 1.500-inch underhead length and are engineered for high-performance applications where standard hardware fails. The 12-point head design allows for a smaller socket size, making them ideal for tight clearances while providing a larger surface area for increased torque application and reduced risk of head rounding.

Manufactured to ARP's exacting standards, these bolts feature a durable black oxide finish to protect against corrosion and provide a clean, professional look for your engine bay or chassis. Whether used for custom brackets, drivetrain components, or specialized accessories, ARP hardware ensures maximum clamping force and reliability.

• Thread Size: 7/16-14
• Underhead Length: 1.500 inches
• Head Style: 12-Point
• Finish: Black Oxide
• Manufacturer Part Number: 643-1500

These ARP general-purpose bolts are engineered for high-strength fastening applications where precision and reliability are critical. Featuring a 3/8-16 thread pitch and a 1.000-inch underhead length, these fasteners are precision machined to provide consistent clamping force. The 12-point head design provides a greater wrenching surface and better torque distribution compared to standard hex-head bolts, making them an excellent choice for tight clearance areas in various automotive systems.

• Manufacturer Part Number: 642-1000
• Thread Size: 3/8-16
• Underhead Length: 1.000 in.
• Head Style: 12-Point
• Finish: Black Oxide

Secure your components with the professional-grade reliability of ARP 641-1750 fasteners. These 5/16-18 x 1.750" 12-point bolts are designed for high-performance applications where superior strength and compact clearance are required. The 12-point (double hex) head design offers a smaller footprint than standard hex bolts, allowing for easier socket access in tight spaces while providing a larger contact area for more consistent torque application.

• Thread Size: 5/16-18
• Under Head Length (UHL): 1.750 inches
• Head Style: 12-Point
• Finish: Corrosion-resistant Black Oxide
• Package Quantity: 5-Pack
• Manufacturer Part Number: 641-1750

Each fastener is engineered to resist stretching and fatigue, making them a significant upgrade over standard OE hardware for critical engine, drivetrain, or chassis assemblies.

Secure your components with the professional-grade reliability of ARP 12-point fasteners. These 5/16-18 x 1.250-inch bolts are engineered for high-performance applications where standard grade-5 or grade-8 hardware may fall short. The compact 12-point head design offers a smaller footprint for easier tool access in tight clearances while providing more surface area for precise torque application.

Each fastener is treated with a durable black oxide finish, providing essential corrosion resistance and a professional aesthetic for engine bays or chassis assembly. These general-purpose bolts are suitable for brackets, accessories, and custom fabrication where high-strength fastening is required.

• Thread Size: 5/16-18
• Underhead Length: 1.250 in
• Head Style: 12-Point
• Finish: Black Oxide
• Package Quantity: 5 Bolts
• Manufacturer Part Number: 641-1250

These ARP 5/16-18 x 1.000-inch fasteners are engineered for high-performance applications where strength and precise torque delivery are paramount. The compact 12-point head design allows for a larger contact area for the wrench, ensuring more even distribution of torque and providing better clearance in tight engine or chassis compartments compared to standard hex-head hardware.

• Thread Size: 5/16-18
• Under Head Length (UHL): 1.000 in.
• Head Style: 12-Point
• Finish: Black Oxide
• Manufacturer Part Number: 641-1000

Constructed with the metallurgy and heat-treating standards ARP is known for, these bolts provide a significant upgrade over grade 5 or grade 8 hardware. The black oxide finish offers a professional appearance and essential corrosion resistance for internal or external automotive use.

Secure your components with the precision and strength of ARP 641-0750 12-point bolts. These fasteners are designed for high-performance automotive applications where reliable clamping force and tight tolerances are required. The 12-point head design provides a greater surface area for socket engagement compared to standard hex heads, allowing for more consistent torque application in confined spaces.

• Thread Size: 5/16-18
• Underhead Length: 0.750 in.
• Head Style: 12-Point
• Material Finish: Black Oxide
• Manufacturer Part Number: 641-0750

Precision-machined for exact thread engagement, these bolts feature a black oxide finish that offers a professional look and moderate corrosion resistance. They are an ideal choice for accessory brackets, covers, or any application requiring a compact, high-strength fastener.

Secure your assembly with the precision and reliability of ARP 640-1000 12-point bolts. These high-performance fasteners are engineered to exceed the capabilities of standard hardware, offering consistent clamping force and superior strength for automotive and specialty applications. The 12-point head design provides a larger contact surface area for easier torque application and improved tool clearance in tight spaces.

Each bolt features a 1/4-20 coarse thread and a 1.000-inch underhead length, finished in a protective black oxide coating to resist corrosion while providing a clean, professional look under the hood or on the chassis.

• Manufacturer Part Number: 640-1000
• Thread Size: 1/4-20
• Underhead Length: 1.000 in
• Head Style: 12-Point (Double Hex)
• Finish: Black Oxide
• Fastener Material: High-Strength Alloy

Secure your components with the professional-grade reliability of ARP 12-point bolts. These high-strength fasteners are engineered to exceed the capabilities of standard hardware, providing superior tensile strength and fatigue resistance for critical automotive and mechanical assemblies. The 12-point head design allows for increased torque application and better tool engagement in compact spaces where traditional hex heads might struggle.

• Manufacturer Part Number: 640-0750
• Thread Size: 1/4-20
• Underhead Length: 0.750 in
• Head Style: 12-Point
• Material: High-performance alloy steel
• Finish: Black Oxide

Each fastener is manufactured to ARP's exacting tolerances, ensuring consistent clamping force and preventing thread stretch or failure under high-load conditions.

Secure your assembly with the precision and strength of ARP 12-point black oxide bolts. Designed for professional engine builders and automotive enthusiasts, these fasteners provide a significant upgrade over standard hardware. The 12-point head design allows for a larger contact surface area, ensuring more consistent torque application and easier access in confined spaces where a traditional hex socket might struggle.

Constructed with the rigorous quality standards ARP is known for, these bolts feature a durable black oxide finish that offers both corrosion resistance and a clean, performance-oriented aesthetic for your engine bay or chassis components.

• Manufacturer Part Number: 640-0515
• Thread Size: 1/4-20
• Underhead Length: 0.515 in
• Head Style: 12-Point
• Finish: Black Oxide

ARP stainless steel hex bolts provide a high-strength, corrosion-resistant fastening solution for engine accessories, brackets, and general automotive applications. These bolts are manufactured from a proprietary stainless steel alloy that is specially heat-treated to achieve a tensile strength of 170,000 psi, significantly exceeding standard Grade 8 hardware specs.

The 622-1000 kit features a polished finish that resists rust and maintains a professional appearance in demanding environments. Each fastener is precision-machined with rolled threads to ensure superior fatigue resistance and accurate torque loading during installation.

• Thread Size: 5/16-18
• Under Head Length (UHL): 1.000 inch
• Head Style: Hex
• Material: Polished Stainless Steel
• Tensile Strength: 170,000 psi
• Quantity: 5 Bolts per package
• Manufacturer Part Number: 622-1000

Secure your components with the superior strength and corrosion resistance of ARP stainless steel bolts. This 5-pack of fasteners (MPN 616-1500) features a 12-point head design, allowing for a smaller socket size that is ideal for tight clearances and high-torque applications where a standard hex head may fail to provide adequate grip.

Constructed from ARP's proprietary Stainless 300 material, these bolts are heat-treated to provide a tensile strength rated at approximately 170,000 psi. This makes them significantly stronger than standard Grade 8 hardware while remaining virtually impervious to rust and corrosion. Each bolt is precision-machined for consistent thread engagement and reliable clamping force in demanding automotive environments.

• Manufacturer Part Number: 616-1500
• Thread Size: 7/16-14
• Under Head Length: 1.500 in.
• Head Style: 12-Point
• Material: Stainless Steel
• Quantity: 5 per package

Secure your assembly with the precision and reliability of ARP 615-1500 stainless steel bolts. Engineered for high-performance applications where both tensile strength and corrosion resistance are paramount, these fasteners feature a 12-point head design. This compact head style allows for a smaller 7/16" wrenching diameter, making them ideal for tight clearances where standard hex heads may not fit.

Forged from ARP 300 stainless steel, these bolts are rated significantly stronger than standard Grade 8 hardware. The polished finish ensures a professional, show-quality appearance that will not rust or pit, even in harsh environments. These are a direct replacement for various hardware needs in engine accessories, brackets, and custom fabrication projects.

• Part Number: 615-1500
• Thread Size: 3/8-16
• Underhead Length: 1.500 in.
• Head Style: 12-Point
• Wrenching Size: 7/16 in.
• Material: ARP 300 Stainless Steel