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ARP Bolts 5/16 ID 0.675 OD Chamfer Washers Set of 10, Chromoly Black Oxide Finish - 200-8587

If you're diving into some serious automotive work, you know that the little things can make a huge difference. That’s where these ARP 5/16 ID 0.675 OD Chamfer Washers come into play. I’ve used these bad boys on my projects, and they really hold up under pressure.

First off, the dimensions are spot on. With an outside diameter of 0.675 inches (or 17.145 mm, for those who prefer metric), and an inside diameter of 0.313 inches (7.950 mm), they fit snugly where you need them. The thickness is a solid 0.120 inches (3.048 mm), which provides just the right amount of support without being overkill.

What I really appreciate is the material—these washers are made from chromoly. If you’re not familiar, that’s a high-strength steel alloy, so you know they’re tough enough for whatever you throw at them. Plus, they come with a black oxide finish that not only looks sleek but also adds a layer of corrosion resistance. Trust me, that’s a must if you’re working in less-than-ideal conditions.

Another little detail that makes a big difference is the inside diameter chamfer. It helps with alignment and makes installation smoother, which is always a bonus when you’re knee-deep in a project. And yes, they’re hardened, so you can count on them to maintain their shape and integrity over time.

These washers come in a pack of ten, which is great because you never know when you might need a few extras. Whether you’re rebuilding an engine or just tackling a DIY project, having reliable washers on hand can save you a lot of headaches down the line.

In short, if you’re looking for durable, reliable washers that won’t let you down, these ARP chamfer washers are a solid choice. I’ve put them through their paces, and they’ve never failed me. Grab a set and see for yourself!

Other Part Numbers:
ARP Bolts #arp200-8587

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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