► Lag Screws

Lag Screws – Heavy-Duty Fasteners for Wood & Timber Lag screws are essential for securing heavy timber, structural framing, & outdoor construction elements. These rugged fasteners are built to anchor deep into wood & engineered lumber, making them ideal for decks, retaining walls, & load-bearing frames. We supply a wide...

Lag Screws – Heavy-Duty Fasteners for Wood & Timber

Lag screws are essential for securing heavy timber, structural framing, & outdoor construction elements. These rugged fasteners are built to anchor deep into wood & engineered lumber, making them ideal for decks, retaining walls, & load-bearing frames. We supply a wide range of lag screws with hex heads & coarse threads, compatible with both hand & power driving tools. Choose from corrosion-resistant finishes like galvanised or stainless steel to suit indoor & outdoor jobs.

What’s in This Collection:
► Galvanised lag screws for structural framing
► Stainless steel lag bolts for outdoor use
► Heavy-duty timber fasteners with hex heads
► Sizes from 6mm to 16mm diameter, various lengths

Sidebar
Filter
  • 10
  • 15
  • 20
  • 25
  • 30
  • 50
  • Featured
  • Most relevant
  • Best selling
  • Alphabetically, A-Z
  • Alphabetically, Z-A
  • Price, low to high
  • Price, high to low
  • Date, old to new
  • Date, new to old
Sort

Sort by:

  • Featured
  • Most relevant
  • Best selling
  • Alphabetically, A-Z
  • Alphabetically, Z-A
  • Price, low to high
  • Price, high to low
  • Date, old to new
  • Date, new to old
  • BBI - M16x50mm - Hex Head Coach Screw - Galv | 629175
    BBI - M16x50mm - Hex Head Coach Screw - Galv | 629175
    BBI - M16x50mm - Hex Head Coach Screw - Galv | 629175This BBI M16x50 is a heavy-duty hex head coach screw for fixing into timber.► Key Features Size: M16x50 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish: Galvanised for corrosion resistance Drive:...
    $2.90
    $2.90
  • BBI - M12x200mm - Hex Head Coach Screw - Galv | 629170
    BBI - M12x200mm - Hex Head Coach Screw - Galv | 629170
    BBI - M12x200mm - Hex Head Coach Screw - Galv | 629170This BBI M12x200 is a heavy-duty hex head coach screw for fixing into timber.► Key Features Size: M12x200 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish: Galvanised for corrosion resistance Drive:...
    $5.18
    $5.18
  • BBI - M12x150mm - Hex Head Coach Screw - Galv | 629165
    BBI - M12x150mm - Hex Head Coach Screw - Galv | 629165
    BBI - M12x150mm - Hex Head Coach Screw - Galv | 629165This BBI M12x150 is a heavy-duty hex head coach screw for fixing into timber.► Key Features Size: M12x150 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish: Galvanised for corrosion resistance Drive:...
    $3.73
    $3.73
  • BBI - M12x130mm - Hex Head Coach Screw - Galv | 629160
    BBI - M12x130mm - Hex Head Coach Screw - Galv | 629160
    BBI - M12x130mm - Hex Head Coach Screw - Galv | 629160This BBI M12x130 is a heavy-duty hex head coach screw for fixing into timber.► Key Features Size: M12x130 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish: Galvanised for corrosion resistance Drive:...
    $3.31
    $3.31
  • BBI - M12x120mm - Hex Head Coach Screw - Galv | 629155
    BBI - M12x120mm - Hex Head Coach Screw - Galv | 629155
    BBI - M12x120mm - Hex Head Coach Screw - Galv | 629155This BBI M12x120 is a heavy-duty hex head coach screw for fixing into timber.► Key Features Size: M12x120 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish: Galvanised for corrosion resistance Drive:...
    $3.11
    $3.11
  • BBI - M12x100mm - Hex Head Coach Screw - Galv | 629150
    BBI - M12x100mm - Hex Head Coach Screw - Galv | 629150
    BBI - M12x100mm - Hex Head Coach Screw - Galv | 629150This BBI M12x100 is a heavy-duty hex head coach screw for fixing into timber.► Key Features Size: M12x100 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish: Galvanised for corrosion resistance Drive:...
    $3.22
    $3.22
  • BBI - M12x90mm - Hex Head Coach Screw - Galv | 629145
    BBI - M12x90mm - Hex Head Coach Screw - Galv | 629145
    BBI - M12x90mm - Hex Head Coach Screw - Galv | 629145This BBI M12x90 is a heavy-duty hex head coach screw for fixing into timber.► Key Features Size: M12x90 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish: Galvanised for corrosion resistance Drive:...
    $2.11
    $2.11
  • BBI - M12x75mm - Hex Head Coach Screw - Galv | 629140
    BBI - M12x75mm - Hex Head Coach Screw - Galv | 629140
    BBI - M12x75mm - Hex Head Coach Screw - Galv | 629140This BBI M12x75 is a heavy-duty hex head coach screw for fixing into timber.► Key Features Size: M12x75 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish: Galvanised for corrosion resistance Drive:...
    $1.94
    $1.94
  • BBI - M12x65mm - Hex Head Coach Screw - Galv | 629135
    BBI - M12x65mm - Hex Head Coach Screw - Galv | 629135
    BBI - M12x65mm - Hex Head Coach Screw - Galv | 629135This BBI M12x65 is a heavy-duty hex head coach screw for fixing into timber.► Key Features Size: M12x65 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish: Galvanised for corrosion resistance Drive:...
    $1.60
    $1.60
  • BBI - M12x50mm - Hex Head Coach Screw - Galv | 629130
    BBI - M12x50mm - Hex Head Coach Screw - Galv | 629130
    BBI - M12x50mm - Hex Head Coach Screw - Galv | 629130This BBI M12x50 is a heavy-duty hex head coach screw for fixing into timber.► Key Features Size: M12x50 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish: Galvanised for corrosion resistance Drive:...
    $1.49
    $1.49
  • BBI - M12x40mm - Hex Head Coach Screw - Galv | 629125
    BBI - M12x40mm - Hex Head Coach Screw - Galv | 629125
    BBI - M12x40mm - Hex Head Coach Screw - Galv | 629125This BBI M12x40 is a heavy-duty hex head coach screw for fixing into timber.► Key Features Size: M12x40 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish: Galvanised for corrosion resistance Drive:...
    $1.18
    $1.18
  • BBI - M10x150mm - Hex Head Coach Screw - Galv | 629120
    BBI - M10x150mm - Hex Head Coach Screw - Galv | 629120
    BBI - M10x150mm - Hex Head Coach Screw - Galv | 629120This BBI M10x150 is a heavy-duty hex head coach screw for fixing into timber.► Key Features Size: M10x150 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish: Galvanised for corrosion resistance Drive:...
    $2.66
    $2.66
  • BBI - M10x130mm - Hex Head Coach Screw - Galv | 629115
    BBI - M10x130mm - Hex Head Coach Screw - Galv | 629115
    BBI - M10x130mm - Hex Head Coach Screw - Galv | 629115This BBI M10x130 is a heavy-duty hex head coach screw for fixing into timber.► Key Features Size: M10x130 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish: Galvanised for corrosion resistance Drive:...
    $2.23
    $2.23
  • BBI - M10x120mm - Hex Head Coach Screw - Galv | 629110
    BBI - M10x120mm - Hex Head Coach Screw - Galv | 629110
    BBI - M10x120mm - Hex Head Coach Screw - Galv | 629110This BBI M10x120 is a heavy-duty hex head coach screw for fixing into timber.► Key Features Size: M10x120 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish: Galvanised for corrosion resistance Drive:...
    $2.11
    $2.11
  • BBI - M10x100mm - Hex Head Coach Screw - Galv | 629105
    BBI - M10x100mm - Hex Head Coach Screw - Galv | 629105
    BBI - M10x100mm - Hex Head Coach Screw - Galv | 629105This BBI M10x100 is a heavy-duty hex head coach screw for fixing into timber.► Key Features Size: M10x100 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish: Galvanised for corrosion resistance Drive:...
    $1.90
    $1.90
  • BBI - M10x90mm - Hex Head Coach Screw - Galv | 629100
    BBI - M10x90mm - Hex Head Coach Screw - Galv | 629100
    BBI - M10x90mm - Hex Head Coach Screw - Galv | 629100This BBI M10x90 is a heavy-duty hex head coach screw for fixing into timber.► Key Features Size: M10x90 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish: Galvanised for corrosion resistance Drive:...
    $2.10
    $2.10
  • BBI - M10x75mm - Hex Head Coach Screw - Galv | 629095
    BBI - M10x75mm - Hex Head Coach Screw - Galv | 629095
    BBI - M10x75mm - Hex Head Coach Screw - Galv | 629095This BBI M10x75 is a heavy-duty hex head coach screw for fixing into timber.► Key Features Size: M10x75 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish: Galvanised for corrosion resistance Drive:...
    $1.42
    $1.42
  • BBI - M10x65mm - Hex Head Coach Screw - Galv | 629090
    BBI - M10x65mm - Hex Head Coach Screw - Galv | 629090
    BBI - M10x65mm - Hex Head Coach Screw - Galv | 629090This BBI M10x65 is a heavy-duty hex head coach screw for fixing into timber.► Key Features Size: M10x65 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish: Galvanised for corrosion resistance Drive:...
    $1.26
    $1.26
  • BBI - M10x50mm - Hex Head Coach Screw - Galv | 629085
    BBI - M10x50mm - Hex Head Coach Screw - Galv | 629085
    BBI - M10x50mm - Hex Head Coach Screw - Galv | 629085This BBI M10x50 is a heavy-duty hex head coach screw for fixing into timber.► Key Features Size: M10x50 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish: Galvanised for corrosion resistance Drive:...
    $1.07
    $1.07
  • BBI - M10x40mm - Hex Head Coach Screw - Galv | 629080
    BBI - M10x40mm - Hex Head Coach Screw - Galv | 629080
    BBI - M10x40mm - Hex Head Coach Screw - Galv | 629080This BBI M10x40 is a heavy-duty hex head coach screw for fixing into timber.► Key Features Size: M10x40 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish: Galvanised for corrosion resistance Drive:...
    $1.04
    $1.04

The Fastener That Won’t Let Go

Built to withstand serious load demands, our lag screws are a must-have for structural timber work. Whether you’re framing a house, fixing ledger boards, or securing posts & beams, we’ve got the heavy-duty fasteners that won’t let go.

► Industrial-strength lag bolts for serious holding power

► Galvanised & stainless options for all weather conditions

► Trusted by builders, landscapers & fabricators

Frequently Asked Questions

Do I need to pre-drill holes for lag screws?

Yes—lag screws should be installed in pre-drilled pilot holes to avoid wood splitting & ensure maximum grip.

Are galvanised lag screws suitable for outdoor use?

Absolutely. Our hot-dip galvanised lag screws are designed to resist rust & corrosion, making them ideal for outdoor timber structures.

What’s the difference between a lag bolt & a regular screw?

Lag bolts have thicker shanks & are designed for high-strength load applications, unlike general-purpose screws which are smaller & less durable.

Brands

Alco

Alco
BBI

BBI
Bordo

Bordo
Bremick

Bremick
Hobsons

Hobsons
Macsim

Macsim
Otter

Otter
Torres

Torres
Trax

Trax

► Lag Screws

Lag Screws – Heavy-Duty Fasteners for Wood & Timber

Lag screws are essential for securing heavy timber, structural framing, & outdoor construction elements. These rugged fasteners are built to anchor deep into wood & engineered lumber, making them ideal for decks, retaining walls, & load-bearing frames. We supply a wide range of lag screws with hex heads & coarse threads, compatible with both hand & power driving tools. Choose from corrosion-resistant finishes like galvanised or stainless steel to suit indoor & outdoor jobs.

What’s in This Collection:
► Galvanised lag screws for structural framing
► Stainless steel lag bolts for outdoor use
► Heavy-duty timber fasteners with hex heads
► Sizes from 6mm to 16mm diameter, various lengths