ARP Expands Hardware Lineup With Nearly 60 New Specialty Nut And Washer Kits

Automotive Racing Products (ARP) is expanding its already massive catalog of premium fasteners with the introduction of nearly 60 new specialty nut and washer kits for 2026. Known across the performance and racing industries for its ultra-high-strength bolts and studs, ARP’s expanded hardware selection gives engine builders, fabricators, and diesel enthusiasts more options to match the same high-quality standards across an entire fastener assembly.

While ARP is widely recognized for its application-specific kits, the company also produces a huge range of “bulk” bolts and studs sold by size rather than by application. To complement those offerings, ARP provides an equally comprehensive assortment of nuts and washers, allowing builders to create custom combinations while maintaining the strength, reliability, and precision the brand is known for.

Expanded Washer Options

ARP’s washer lineup now includes both polished stainless steel and black oxide–treated 8740 chrome moly options. These washers are available in SAE sizes ranging from 1/4-inch to 3/4-inch, with both standard and chamfered models available. The chamfered versions are specifically designed for use with bolts, ensuring proper seating and load distribution in demanding applications.

Metric sizes are also offered, covering M6 through M18 fasteners. In addition, ARP produces special insert washers designed to protect the tops of holes from galling or collapsing—an important feature in high-load applications and areas that see repeated service, which is common in high-performance diesel and motorsports builds.

Premium Nuts Built In-House

Alongside its washer offerings, ARP manufactures a wide range of premium-quality nuts produced in-house to meet some of the industry’s most stringent specifications. These nuts are available in polished stainless steel or black oxide–treated 8740 chrome moly and include both 12-point and hex configurations for SAE coarse, SAE fine, and metric thread applications.

For applications where vibration resistance is critical, ARP also offers Nyloc and self-locking hex “Jet” nuts, along with 12-point “K” nuts designed for high-performance environments. Serrated flange nuts are also available, providing extra holding power without the need for a separate washer in certain installations.

A Longstanding Name In High-Strength Fasteners

Founded in 1968, ARP has become one of the most respected names in the performance fastener industry. The company remains family owned and operated, and its products are manufactured to extremely tight standards that have made them a staple in professional motorsports, high-performance automotive builds, and diesel engine applications where reliability under extreme loads is essential.

For diesel enthusiasts and professional builders alike, the expanded lineup of ARP nuts and washers ensures that every piece of hardware in a build can match the strength and precision of the company’s renowned bolts and studs.

Learn More

For more information, check out the 2026 ARP catalog online at www.ARPcatalog.com, or request a free printed copy of the information-packed 180-page publication. Personalized technical assistance is also available by calling 800-826-3045.