Your Cart

ARP 200-8554 Chrome Moly Hardened Washers 3/8" I.D. - 10 Pack

Manufacturer

ARP

<p>Today, ARP&rsquo;s product line contains thousands of part numbers, and has expanded to include virtually every fastener found in an engine and driveline and throughout the suspension and frame. These range from quality high performance OEM replacement parts to exotic specialty hardware for Formula 1, IndyCar, NASCAR and NHRA drag racing and marine applications.</p>

Picture for manufacturer ARP

Part Number

200-8554
7 reviews
03/12/2036 7:44 AM
Sale Price

$8.64

In Stock (10+)

delivery box

Usually delivered within 2 days

Add To Cart

Check out with

ApplePay
Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

ARP 200-8554 high-performance chrome moly washers are engineered for demanding fastener applications where precision and strength are critical. These premium washers feature a 3/8" inside diameter with no chamfer design, making them ideal for use with ARP cylinder head studs, main studs, and other critical fasteners.

Key Features:

  • Constructed from premium chrome moly steel for exceptional strength and durability
  • Parallel-ground surfaces ensure even load distribution and precise torque transfer
  • Heat-treated and hardened to prevent deformation under high clamp loads
  • Black oxide finish provides corrosion resistance and professional appearance
  • No chamfer design for specific fastener applications
  • Precision machined to tight tolerances for consistent performance

This package includes 10 washers, allowing you to keep critical spares on hand for engine builds and repairs. ARP washers are the professional's choice when precise fastener preload and reliability are non-negotiable.

Products specifications

Hardened

Yes

Inside Diameter Chamfer

No

Material

Black Oxide

Quantity

Sold as a set of 10.

Size (ID/OD)

3/8 / 5/8

Thickness

.120in

Washer Finish

Black oxide

Washer Inside Diameter (in)

0.375 in.

Washer Inside Diameter (mm)

9.525 mm

Washer Material

Chromemoly

Washer Outside Diameter (in)

0.625 in.

Washer Outside Diameter (mm)

15.875 mm

Washer Thickness (in)

0.120 in.

Washer Thickness (mm)

3.048 mm

Best prices, fast shipping, good service. Thank you!

Low prices and super fast shipping.

Great prices and shipped promptly.

BEST PRICE AROUND, HANDS DOWN. Shipping was fast and communication was impeccable. THANKS FOR THE PROFESSIONALISM.

best prices around by far for the exact same product! Would definetely recomend autoplicity to a friend

the product was the cheapest price i could find on the web and shipping was quick i got the part in two days from purchase

Wonderful experience with seller. Ordered on a Monday night and received on Thursday. Talking about service. Man these guys are awesome. I will be ordering more in the future with Autoplicity. Thanks again!

Share icon
Return Policy
Returns are easy at Boatplicity

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy