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ARP 200-8578 Chrome Moly Hardened Washers I.D. - 3/8 2-Piece Set

Part of: ARP Chrome Moly Hardened Washers

Other options in this family: ARP 200-8530 ARP 200-8592 ARP 200-8554 ARP 200-8688 ARP 200-8507

Manufacturer

Picture for manufacturer ARP

Part Number

200-8578
9 reviews
Sale Price

$3.55

Estimated ship date Friday, November 27

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Product Details

ARP 200-8578 high-performance washers are precision-engineered fastener components constructed from premium chrome moly steel. These washers are parallel-ground and heat-treated for maximum durability, then finished in corrosion-resistant black oxide.

Key Features:

  • Premium chrome moly steel construction for superior strength
  • Parallel-ground surfaces ensure even load distribution
  • Hardened and heat-treated for durability under high stress
  • Black oxide finish resists corrosion
  • No I.D. chamfer design
  • 3/8" inside diameter
  • 2-piece package

ARP washers are essential components for high-performance engine builds, providing reliable clamping force and protecting fastener assemblies from damage. The precision manufacturing process ensures consistent thickness and parallelism, critical for maintaining proper bolt torque and preventing fastener failure. Ideal for cylinder head installations, connecting rod assemblies, and other critical fastening applications where ordinary washers simply won't do.

Products specifications

Material

Black Oxide

Size (ID/OD)

5/16 / 0.550

Thickness

.120in

Received order quickly. I had to return it because I ordered the wrong part. I would not hesitate to order from this company again.

Had then part I needed for a great price!

1st order. Shipped super fast and prices are amazing. I will be back for sure.

Great customer service. Quick process and shipped les than 24hrs after order. 5 stars.

Autoplicity had exactly the part I was looking for, for my SRT8 Challenger, at the best price I could find!

No problems ordering.

Quick, cheap, and accurate. What else do you need?

I ordered a Flowmaster cat back system for my 2012 F-150. The order arrived the day they said it would and the product came at a fair price. Well done.

Great prices and fast shipping. It doesn't get any better

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