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ARP 200-8579 Chrome Moly Hardened Washers ID - 3/8 2-Piece Set

Manufacturer

Part Number

200-8579
Sale Price

$3.55

Estimated ship date Friday, November 27

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No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

ARP 200-8579 high-performance washers are precision-engineered for demanding engine applications. These premium washers are constructed from chrome molybdenum steel and feature parallel-ground surfaces for optimal load distribution and clamping force.

Key Features:

  • Chrome moly construction for superior strength and durability
  • Precision parallel-ground surfaces ensure even pressure distribution
  • Heat-treated and hardened for maximum performance
  • Black oxide finish for corrosion resistance
  • Inside diameter chamfer design for proper fastener seating
  • 3/8 inch inner diameter
  • Includes 2 pieces per package

ARP washers are essential components when installing cylinder head bolts, main cap fasteners, or any critical engine fastener system. The chamfered inner diameter helps center the fastener and prevents edge loading, while the hardened construction resists deformation under extreme clamping loads. These washers meet ARP's exacting quality standards and are ideal for high-performance street, racing, and marine applications.

Products specifications

Hardened

Yes

Inside Diameter Chamfer

Yes

Material

Black Oxide

Quantity

Sold as a pair.

Size (ID/OD)

5/16 / 0.550

Thickness

.120in

Washer Finish

Black oxide

Washer Inside Diameter (in)

0.313 in.

Washer Inside Diameter (mm)

7.950 mm

Washer Material

Chromemoly

Washer Outside Diameter (in)

0.550 in.

Washer Outside Diameter (mm)

13.970 mm

Washer Thickness (in)

0.120 in.

Washer Thickness (mm)

3.048 mm

Quick service. keeps you up to date

quick and painless with very good pricing

Awesome company that's ships it quick, product is perfect.

Thank you

The order number 15547 tailgate lock fit perfectly. The shipping was very fast, ordered on Tuesday, delivered on Saturday. Will order from again.

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