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ARP 400-8657 Cylinder Head Hex Nuts - 5 Piece Set

Manufacturer

Picture for manufacturer ARP

Part Number

400-8657
9 reviews
Sale Price

$5.52

Estimated ship date Wednesday, February 03

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No Hassle Returns

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Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

ARP 400-8657 Cylinder Head Hex Nuts

ARP's precision-engineered cylinder head hex nuts are manufactured from premium aerospace-quality materials to deliver exceptional strength and reliability in high-performance engine applications. This 5-piece set features standard hex nuts designed to work seamlessly with ARP cylinder head studs.

Key Features

  • Aerospace-Grade Materials: Constructed from premium alloy steel for maximum durability
  • High Tensile Strength: Rated at 180,000 PSI tensile strength for extreme clamping force
  • Black Oxide Finish: Corrosion-resistant coating provides long-lasting protection
  • Precision Manufactured: Meets ARP's rigorous quality control standards
  • Perfect Compatibility: Designed to pair with ARP cylinder head studs

What's Included

5 standard hex nuts with black oxide finish

Applications

These hex nuts are ideal for cylinder head stud installations in performance engines, racing applications, and high-stress environments where factory hardware may fail. The 180,000 PSI rating ensures consistent clamping force and prevents head gasket failure under extreme conditions.

Note: Always follow ARP's torque specifications and installation instructions for proper fastener installation.

Products specifications

Fastener Yield Strength (psi)

140,000 psi

Nut Finish

Polished

Nut Material

Stainless steel

Nut Style

Hex

Nylon Insert

No

Quantity

Sold as a set of 5.

Self-Locking

No

Size

1/2-13

Thread Size

1/2-13 in.

Washers Included

No

this is my new home... very cool site, beat summit and jegs by $20 to $30

Extremely Happy! Best price on the web, easy order tracking, if only all online orders from other sources were this easy. I ordered a component from another online retailer who showed parts "in stock" only to see my status as "sent to warehouse" and it was weeks. When Autoplicity shows "in stock" it really was and delivered right away.

Lowest price that i could find,fast shipping!!!!!<br>

It took exactly a week for the part to be shipped because the part came directly from the supplier. But the price was the lowest around.

Ordering was easy and had items in stock. Will see how fast shipping is...

easy

Perfect item, fast shipment, great communication, and the best price.

Great communication, lowest price I could find anywhere, and quick shipping with a tracking number. What more could you ask for. 2nd time dealing with them and still impressed! order# 6935

They had exactly what I needed and the cheapest price i found anywhere.

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