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ARP Bolts 1/4-20 x 4.250in UHL Hex Stainless Steel Bolts (5/pkg) - Polished Finish - 621-4250

Upgrade Your Fasteners with ARP 621-4250 Bolts

If you're looking to enhance the durability and reliability of your vehicle's assembly, the ARP 621-4250 bolts are your go-to solution. Designed specifically for automotive applications, these fasteners offer superior strength and performance, making them an essential upgrade for any serious DIY mechanic or track enthusiast.

Fitment

These bolts are compatible with a variety of applications where a 1/4-20 in. RH fastener is required. Whether you're working on a classic muscle car or a modern performance vehicle, the ARP 621-4250 bolts provide the reliability you need to keep your engine and components firmly in place.

Technical Specs

  • Fastener Size: 1/4-20 in. RH
  • Underhead Length: 4.250 in.
  • Fastener Head Style: Hex head
  • Fastener Material: Stainless steel
  • Fastener Finish: Polished
  • Fastener Grade: ARP Stainless 300
  • Fastener Yield Strength: 180,000 psi
  • Wrench Diameter: 5/16 in.
  • Washers Included: Yes

Why Choose ARP 621-4250 Bolts?

These bolts are crafted from ARP Stainless 300 material, providing exceptional resistance to corrosion and wear. With a yield strength of 180,000 psi, you can trust that these fasteners will withstand the rigors of high-performance applications. The polished finish not only enhances aesthetics but also minimizes friction during installation, ensuring a smooth fit every time.

Customer Feedback

One satisfied 2021 Ford F-150 owner shared, “I installed the ARP 621-4250 bolts while upgrading my suspension. The fit was perfect, and they added the peace of mind I needed for my off-road adventures.” Another 2019 Subaru WRX owner mentioned, “These bolts were a breeze to install, and I love the polished look. They hold up great under pressure, even during my track days.”

When it comes to your vehicle's performance, don't settle for anything less than the best. Upgrade to ARP 621-4250 bolts and experience the difference in quality and reliability.

Other Part Numbers:
ARP Bolts #arp621-4250

Proposition 65

⚠ WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

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The Story Behind ARP Bolts

ARP (Automotive Racing Products) was founded by Gary Holzapfel in 1968 when he noticed his drag-racing friends succumbing to bolt-induced engine failure as a result of poor-quality fasteners. He drew upon his expertise in the aerospace industry to develop a solution, which turned into a successful business nonetheless. 

Since its inception, ARP has been engineering and perfecting a wide range of bolts, studs, nuts, and other fasteners for engines, cylinder heads, headers, wheels, and transmissions. Today, ARP remains the undisputed world leader in automotive fasteners. Racing aficionados everywhere know and recognize the ARP brand and can vouch for its quality.

What Makes ARP Bolts So Special?

Located in Ventura, California, all ARP processes from raw wire to finished fasteners are conducted in-house, right here in the USA. The company continually improves its processes with strict quality control guidelines and is dedicated to producing products that are second to none. Simply put, ARP Bolts are better than the competition because of their quality materials and advanced processes. 

ARP prides itself on using only top-quality materials that are above the usual “aerospace-grade” quality that other manufacturers settle for. For example, while 8740 Chromoly steel has four different grades, ARP only uses the top two, SDF and CHQ. These grades cost twice as much as the lower commercial and aircraft grades, but deliver “zero defect” quality that you can trust each and every time.

ARP Bolts are built to withstand serious racing, possess greater tensile strengths, and can survive higher stress levels than most aircraft fasteners. ARP is dedicated to creating fasteners that boast ultimate strength and durability to ensure they last race after race. Its product lineup ranges from quality high-performance OEM parts to exotic specialty hardware for IndyCar, NASCAR, NHRA drag racing, Formula 1, and even marine applications.

Equip Your Ride with ARP Bolts at Vivid Racing

If you are looking to change the fasteners on your car, you’ve come to the right place. No other brand beats out ARP Bolts in terms of strength, quality, and race-proven success. Vivid Racing is, therefore, proud to carry an extensive lineup of products from American Racing Products like bolts, fluids, sealants, hand tools, stud kits, piston sleeves, wheel bolts, and more! If you have any questions regarding the parts above, please call our specialized sales team at (480) 966-3040.

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