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ARP 200-8678 High-Performance Chrome Moly Washer 3/8" ID 7/8" OD Black Oxide 2-Pack

Manufacturer

Picture for manufacturer ARP

Part Number

200-8678
9 reviews
Sale Price

$4.19

Estimated ship date Tuesday, November 24

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Product Details

The ARP 200-8678 is a premium high-performance hardened washer designed for serious engine building and fastener applications. Manufactured from 8740 chrome moly steel, each washer is parallel-ground for precise flatness and finished in a corrosion-resistant black oxide coating. This specific kit features a 3/8" inside diameter, 7/8" (0.875") outside diameter with a distinctive radiused outer edge, and measures 0.150" thick. The inside bore is without chamfer, making it well-suited for applications where a clean, flat seating surface is required.

Key Features:

  • Material: Premium 8740 chrome moly steel
  • Inside Diameter (ID): 3/8" (0.375")
  • Outside Diameter (OD): 7/8" (0.875") — Radiused OD
  • Thickness: 0.150"
  • Chamfer: No I.D. chamfer
  • Finish: Black oxide for corrosion resistance
  • Construction: Parallel-ground and hardened for consistent clamping load
  • Quantity: Sold as a 2-piece kit

ARP special-purpose washers are an essential addition to any performance engine build. The hardened construction ensures they won't deform under high clamping loads, providing reliable and consistent fastener preload. Whether used on cylinder heads, connecting rods, or other high-stress fastener locations, these washers deliver the precision and reliability that ARP is known for.

Products specifications

Hardened

Yes

Inside Diameter Chamfer

No

Material

Black Oxide

Quantity

Sold as a pair.

Size (ID/OD)

3/8 / 7/8

Thickness

.150in

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)

0.875 in.

Washer Outside Diameter (mm)

22.225 mm

Washer Thickness (in)

0.150 in.

Washer Thickness (mm)

3.810 mm

i ordered a VP 5 gallon container,<br>order: 28683<br><br>the process was easy,<br>they delivered exactly as promised, when they said they would <br><br>A+<br><br>Shipping was a little high

it was one of the most easiest sites to use and the order shipped really quick. will buy from again.

Very smooth transaction. Extremely fast shipment. I highly recommend this merchant!

Cheapest place I found for High Performance Rotors. :)

Thanks!

Autoplicity is awesome! Easy check out and quick shipping! Will buy from again!

Great price and super fast shipping!!<br>Will be back!!!

Good site easy to search for and find parts. The lowest prices on almost every part I have been able to find for my truck.

Seller was quick and hasle free to deal with. Will purchase again from this seller.

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