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SKU: LBHDG-58X18

5/8" x 18" Conquest Hex Head Lag Bolt for Wood - Hot Dip Galvanized

5/8" x 18" Conquest Hex Head Lag Bolt for Wood - Hot Dip Galvanized!

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Lag Bolts

Bolts

SKU: LBHDG-58X18

5/8" x 18" Conquest Hex Head Lag Bolt for Wood - Hot Dip Galvanized

$13.99
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Ships Sep 28 when you order now

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Specifications

Diameter: 5/8"
Length: 18"
Thread Length: 6"
Thread Type: Coarse
Threads Per Inch: 5
Socket Size: 15/16"
Head Type: Hex Head
Material: Carbon Steel
Finish: Hot Dip Galvanized
Measuring System: Standard SAE
Manufacturer Name: Conquest Fasteners
Quantity: 1
Description

5/8" x 18" Conquest Hex Head Lag Bolt for Wood - Hot Dip Galvanized

The 5/8" x 18" Conquest Lag Bolt offers deep-penetration strength and rugged corrosion protection for extreme outdoor builds. Its coarse 5 TPI threads provide strong wood engagement, and the hot dip galvanized finish shields it from the harshest environments.

5/8" x 18" Conquest Hex Head Lag Bolt – Galvanized Extra-Long Bolt for Maximum Timber Fastening

Use this bolt for oversized timber assemblies, retaining structures, or any application that demands maximum holding strength in treated or weather-exposed wood.

Key Features

  • 18" Length: Ideal for large wood framing and anchoring.
  • Hot Dip Galvanized: Resists corrosion from moisture, salt, and treatment chemicals.
  • Hex Head: Installs with high-torque tools easily and quickly.
  • 5 TPI Threads: Cuts fast and holds firm under stress.

Common Applications

  • Oversized structural timber framing
  • Massive deck or dock supports
  • Bridge and boardwalk frames
  • Large retaining wall ties
  • Outdoor shelter foundations

Installation Tips

  • Use a long drill bit for full-depth pilot hole creation.
  • Apply even pressure during driving to prevent bending.
  • Ensure bolt is seated flush for best load transfer and safety.

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 26 reviews
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C
Cari Dodson
Received on time!

Ordered these late, and under pressure, but received on time! Note that you need a 3/4 socket and it's not typical in most sets.

M
Michelle

This item worked well for its intended purpose of mounting and securing a wood mantle.

N
Nick Supe
Great Lags

I like using these to attach deck ledger boards