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SKU: LB4SS-516X312

5/16" x 3-1/2" Conquest Hex Head Lag Bolt for Wood - 18-8 Stainless Steel

5/16" x 3-1/2" Conquest Hex Head Lag Bolt for Wood - 18-8 Stainless Steel!

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Lag Bolts

Bolts

SKU: LB4SS-516X312

5/16" x 3-1/2" Conquest Hex Head Lag Bolt for Wood - 18-8 Stainless Steel

$0.65
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Ships Jun 22 when you order now

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Specifications

Diameter: 5/16"
Length: 3-1/2"
Thread Length: 2-1/4"
Thread Type: Coarse
Threads Per Inch: 9
Socket Size: 1/2"
Head Type: Hex Head
Material: 18-8 Stainless Steel
Finish: None
Measuring System: Standard SAE
Manufacturer Name: Conquest Fasteners
Quantity: 1
Description

5/16" x 3-1/2" Conquest Hex Head Lag Bolt for Wood - 18-8 Stainless Steel

This 5/16" x 3-1/2" lag bolt features a long shaft and aggressive thread pattern to secure thick pieces of wood together. The stainless steel material prevents rust and corrosion, even in constant outdoor exposure. Its hex head ensures controlled driving torque, helping you seat the bolt with accuracy and strength.

5/16" x 3-1/2" Conquest Hex Head Lag Bolt – 5/16" Coarse Thread Stainless Steel Lag Bolt

When fastening deeper through multiple timbers or mounting brackets to posts, this lag bolt is a top performer. Its length supports extended engagement for high-strength applications. Great for pergolas, framing, and more exposed builds requiring both reach and resilience.

Key Features

  • 3-1/2" Length: Suited for multi-layer fastening or structural wood joints.
  • Corrosion Resistance: 18-8 stainless steel performs in outdoor environments.
  • Hex Drive: Simple to install using sockets or wrenches.
  • Strong Grip: Coarse threads for reliable hold in wood.

Common Applications

  • Pergola framing
  • Exterior brackets
  • Deck step reinforcement
  • Cross-beam attachment
  • Outdoor hardware installation

Installation Tips

  • Align pilot hole to ensure bolt seats correctly.
  • Install with steady, even torque to avoid overdriving.
  • Finish with a washer if surface material is soft or warped.

California Residents: WARNING

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Lag Bolts

Bolts

× WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects and other reproductive harm. For more information visit: www.P65Warnings.ca.gov.

Customer Reviews

Based on 8 reviews
88%
(7)
13%
(1)
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W
William D. Mccasland
Great job

Needed screws to mount 2 ceiling fans to a beam. Got here quick and exactly what I needed.

D
Douglas Zimmerman
Stainless Lag Screw Review

I needed an uncommon size, and Fasteners Plus had just what I needed. It was quickly delivered, and the order was accurate, and the quality was excellent.

K
Kevin Hall
Small order

I was very satisfied with the lag screws I purchased. My only issue with Fastners + is with the standard shipping cost. Unless I order a large quantity, the shipping cost charged is exorbinate.