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Dorman 44166 Grade 5 Hex Head Cap Screw 5/16-24 x 2-1/2 In.

Part of: Dorman Hex Head Cap Screw Grade 5 Zinc

Other options in this family: Dorman 803-005 Dorman 803-222 Dorman 170112 Dorman 803-105 Dorman 170117

Manufacturer

Picture for manufacturer Dorman

Part Number

44166
6 reviews
Sale Price

$2.63

1 left at this price

delivery box

Usually delivered within 2 days

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Fitment guaranteed

Fitment guaranteed

Product Details

The Dorman 44166 is a Grade 5 hex head cap screw with a 5/16-24 UNF (fine thread) specification and 2-1/2 inch length, designed for a wide range of automotive, powersports, marine, and general mechanical repair applications. Manufactured from steel with a zinc plating finish, this fastener delivers reliable holding strength wherever a medium-duty SAE fine-thread bolt is required.

Key Features:

  • Grade 5 strength — heat-hardened steel construction meets SAE J429 Grade 5 tensile strength requirements
  • 5/16-24 UNF fine thread — provides precise thread engagement and superior resistance to loosening under vibration
  • 2-1/2 inch length — suitable for deeper fastening applications requiring additional grip
  • Hex head drive — compatible with standard wrenches and sockets for easy installation and removal
  • Zinc-plated finish — corrosion-tested to help ensure long-term resistance to rust and oxidation
  • Manufactured to specific thread tolerance standards — ensures consistent, reliable fit in threaded holes

Part of Dorman's Autograde hardware line, the 44166 is a dependable replacement fastener for automotive chassis, suspension, engine accessory, and general repair use wherever a 5/16-24 x 2-1/2 inch Grade 5 hex cap screw is specified.

Products specifications

Fastener Finish

Zinc plated

Fastener Head Style

Hex

Fastener Material

Steel

Feature - Benefit 1

Available in many head styles including round, flat, pan, oval, truss, and hex

Feature - Benefit 2

Slotted, Phillips, Hex, Square, and a multitude of other varieties available

Feature - Benefit 3

All our screws are constructed of high-quality metal

Feature - Benefit 4

A protective finish such as zinc plating or black oxide is often provided

Quantity

Sold as a pair.

Thread Size

5/16-24 in.

Underhead Length (in)

2.500 in.

Washers Included

No

Wrench Diameter

1/2 in.

SAE or Metric

SAE

Callout Size

Grade 5

Material

Steel

Thread Size

5/16-24

Package Contents

2 Cap Screws

Great company..Great communication..Fast shipping. A+++++++++++++++.<br>Will do business again.

Better than average prices and easy to order.beats driving all over town looking

First time that I have tried Autoplicity. Best price on the brand/part that I really wanted. Fast turnaround, and they have great customer service. Will use again. Highly recomend!

Great transaction at a great price.

Fast shipping , product just as described, and quality product.

fast and easy website to use. Also had the best price on the part I ordered

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