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ARP 400-8509 High-Performance Chrome Moly Washer with Chamfer

Manufacturer

Picture for manufacturer ARP

Part Number

400-8509
7 reviews
Sale Price

$3.00

In Stock (10+)

delivery box

Usually delivered within 2 days

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Product Details

The ARP 400-8509 is a precision-engineered, single-piece high-performance washer featuring an inside diameter (I.D.) chamfer. Manufactured by ARP (Automotive Racing Products), this washer is built to the exacting tolerances demanded by professional engine builders and performance enthusiasts alike.

Constructed from premium chrome moly steel, this washer is parallel-ground to ensure consistent thickness and a perfectly flat seating surface. It is then hardened for superior strength and finished in a durable black oxide coating for corrosion resistance.

Key Features:

  • Single-piece construction for maximum integrity
  • I.D. chamfer for clean, precise fastener seating
  • Premium chrome moly steel construction
  • Parallel-ground for consistent thickness and flatness
  • Hardened for superior load-bearing strength
  • Black oxide finish for corrosion resistance
  • Available in a variety of sizes and thicknesses

ARP washers are an essential component when assembling performance engines, providing a reliable load-bearing surface that protects cylinder head and component surfaces from fastener pull-through or galling. Engineered to complement ARP studs and bolts, they ensure proper clamp load distribution across critical joints.

Products specifications

Hardened

No

Inside Diameter Chamfer

Yes

Quantity

Sold individually.

Size (ID/OD)

7/16 / 0.812

Thickness

.120?

Washer Finish

Natural

Washer Inside Diameter (in)

0.438 in.

Washer Inside Diameter (mm)

11.125 mm

Washer Material

Stainless steel

Washer Outside Diameter (in)

0.813 in.

Washer Outside Diameter (mm)

20.650 mm

Washer Thickness (in)

0.120 in.

Washer Thickness (mm)

3.048 mm

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!

Wish there were better product description. In the description it said there is a Carbon Fiber version, but no link. Would of been interested in that up sell to the CF Version. Do you even Carry this version, how much, and how to find it ? Also there w

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

Great prices and FAST shipping!! Definitely will buy products here again!

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