► 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

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  • BBI - M10x100mm - Hex Head Coach Screw - Zinc | 628105
    BBI - M10x100mm - Hex Head Coach Screw - Zinc | 628105
    BBI - M10x100mm - Hex Head Coach Screw - Zinc | 628105This 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: Zinc Plated for corrosion resistance...
    $1.63
    $1.63
  • BBI - M10x90mm - Hex Head Coach Screw - Zinc | 628100
    BBI - M10x90mm - Hex Head Coach Screw - Zinc | 628100
    BBI - M10x90mm - Hex Head Coach Screw - Zinc | 628100This 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: Zinc Plated for corrosion resistance...
    $1.31
    $1.31
  • BBI - M10x75mm - Hex Head Coach Screw - Zinc | 628095
    BBI - M10x75mm - Hex Head Coach Screw - Zinc | 628095
    BBI - M10x75mm - Hex Head Coach Screw - Zinc | 628095This 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: Zinc Plated for corrosion resistance...
    $1.30
    $1.30
  • BBI - M10x65mm - Hex Head Coach Screw - Zinc | 628090
    BBI - M10x65mm - Hex Head Coach Screw - Zinc | 628090
    BBI - M10x65mm - Hex Head Coach Screw - Zinc | 628090This 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: Zinc Plated for corrosion resistance...
    $1.10
    $1.10
  • BBI - M10x50mm - Hex Head Coach Screw - Zinc | 628085
    BBI - M10x50mm - Hex Head Coach Screw - Zinc | 628085
    BBI - M10x50mm - Hex Head Coach Screw - Zinc | 628085This 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: Zinc Plated for corrosion resistance...
    $0.97
    $0.97
  • BBI - M10x40mm - Hex Head Coach Screw - Zinc | 628080
    BBI - M10x40mm - Hex Head Coach Screw - Zinc | 628080
    BBI - M10x40mm - Hex Head Coach Screw - Zinc | 628080This 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: Zinc Plated for corrosion resistance...
    $0.84
    $0.84
  • BBI - M8x100mm - Hex Head Coach Screw - Zinc | 628075
    BBI - M8x100mm - Hex Head Coach Screw - Zinc | 628075
    BBI - M8x100mm - Hex Head Coach Screw - Zinc | 628075This BBI M8x100 is a heavy-duty hex head coach screw for fixing into timber.► Key Features Size: M8x100 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish: Zinc Plated for corrosion resistance...
    $0.98
    $0.98
  • BBI - M8x30mm - Hex Head Coach Screw - Zinc | 628045
    BBI - M8x30mm - Hex Head Coach Screw - Zinc | 628045
    BBI - M8x30mm - Hex Head Coach Screw - Zinc | 628045This BBI M8x30 is a heavy-duty hex head coach screw for fixing into timber.► Key Features Size: M8x30 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish: Zinc Plated for corrosion resistance...
    $0.36
    $0.36
  • BBI - M6x100mm - Hex Head Coach Screw - Zinc | 628040
    BBI - M6x100mm - Hex Head Coach Screw - Zinc | 628040
    BBI - M6x100mm - Hex Head Coach Screw - Zinc | 628040This BBI M6x100 is a heavy-duty hex head coach screw for fixing into timber.► Key Features Size: M6x100 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish: Zinc Plated for corrosion resistance...
    $0.62
    $0.62
  • BBI - M6x90mm - Hex Head Coach Screw - Zinc | 628037
    BBI - M6x90mm - Hex Head Coach Screw - Zinc | 628037
    BBI - M6x90mm - Hex Head Coach Screw - Zinc | 628037This BBI M6x90 is a heavy-duty hex head coach screw for fixing into timber.► Key Features Size: M6x90 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish: Zinc Plated for corrosion resistance...
    $0.60
    $0.60
  • BBI - M6x75mm - Hex Head Coach Screw - Zinc | 628035
    BBI - M6x75mm - Hex Head Coach Screw - Zinc | 628035
    BBI - M6x75mm - Hex Head Coach Screw - Zinc | 628035This BBI M6x75 is a heavy-duty hex head coach screw for fixing into timber.► Key Features Size: M6x75 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish: Zinc Plated for corrosion resistance...
    $0.29
    $0.29
  • BBI - M6x50mm - Hex Head Coach Screw - Zinc | 628025
    BBI - M6x50mm - Hex Head Coach Screw - Zinc | 628025
    BBI - M6x50mm - Hex Head Coach Screw - Zinc | 628025This BBI M6x50 is a heavy-duty hex head coach screw for fixing into timber.► Key Features Size: M6x50 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish: Zinc Plated for corrosion resistance...
    $0.24
    $0.24
  • BBI - M6x40mm - Hex Head Coach Screw - Zinc | 628020
    BBI - M6x40mm - Hex Head Coach Screw - Zinc | 628020
    BBI - M6x40mm - Hex Head Coach Screw - Zinc | 628020This BBI M6x40 is a heavy-duty hex head coach screw for fixing into timber.► Key Features Size: M6x40 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish: Zinc Plated for corrosion resistance...
    $0.24
    $0.24
  • BBI - M6x30mm - Hex Head Coach Screw - Zinc | 628015
    BBI - M6x30mm - Hex Head Coach Screw - Zinc | 628015
    BBI - M6x30mm - Hex Head Coach Screw - Zinc | 628015This BBI M6x30 is a heavy-duty hex head coach screw for fixing into timber.► Key Features Size: M6x30 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish: Zinc Plated for corrosion resistance...
    $0.16
    $0.16
  • BBI - M6x25mm - Hex Head Coach Screw - Zinc | 628010
    BBI - M6x25mm - Hex Head Coach Screw - Zinc | 628010
    BBI - M6x25mm - Hex Head Coach Screw - Zinc | 628010This BBI M6x25 is a heavy-duty hex head coach screw for fixing into timber.► Key Features Size: M6x25 Grade: Class 4.6 for reliable strength Material: Carbon Steel Finish: Zinc Plated for corrosion resistance...
    $0.13
    $0.13
  • Alco - HEX HEAD COACH SCREW GALV 10mm x 75mm PK 15 | ALCGSHC1075
    Alco - 10mm x 75mm Hex Head Coach Screw GALV 10pk | ALCGSHC1075
    Alco - Hex Head Coach Screw Galvanised 10mm x 75mm PK 15 | ALCGSHC1075 Built for demanding timber fixing applications, the Alco Hex Head Coach Screws provide dependable strength and long-lasting performance on site. Featuring a galvanised finish for corrosion resistance and a hex...
    $29.44
    $29.44
  • Alco - HEX HEAD COACH SCREW GALV 10mm x 50mm PK 20 | ALCGSHC1050
    Alco - 10mm x 50mm Hex Head Coach Screw GALV 15pk | ALCGSHC1050
    Alco - Hex Head Coach Screw Galvanised 10mm x 50mm PK 20 | ALCGSHC1050 Designed for strong timber fixing, the Alco Hex Head Coach Screws deliver reliable holding power for structural and general construction applications. Manufactured with a galvanised finish for corrosion resistance and...
    $25.15
    $25.15
  • Alco - HEX HEAD COACH SCREW GALV 10mm x 40mm PK 25 | ALCGSHC1040
    Alco - 10mm x 40mm Hex Head Coach Screw GALV 20pk | ALCGSHC1040
    Alco - HEX HEAD COACH SCREW GALV 10mm x 40mm PK 25 | ALCGSHC1040 Built for strong timber fixing, the Alco Hex Head Coach Screws deliver reliable holding power for structural and heavy-duty applications. Manufactured with a galvanised finish, these coach screws offer excellent...
    $28.40
    $28.40
  • Hobsons - M12 x 105 - Lag Screw Eye - 316 Stainless - A4 | HES16PLM12
    Hobsons - M12 x 105 - Lag Screw Eye - 316 Stainless - A4 | HES16PLM12
    Hobsons - M12 x 105 - Lag Screw Eye - 316 Stainless - A4 | HES16PLM12This Hobson M12 x 105 is a screw for general fastening.► Key Features Size: M12 x 105 Finish: 316 Stainless Steel for corrosion resistance Genuine Hobson — trusted Australian...
    $10.22
    $10.22
  • Hobsons - 316 Lag Screw Eye (Size: M10 x 80) Pack of 10 | HES16PLM10Hobsons - 316 Lag Screw Eye (Size: M10 x 80) Pack of 10 | HES16PLM10
    Hobsons - 316 Lag Screw Eye (Size: M10 x 80) Pack of 10 | HES16PLM10
    Hobsons - 316 Lag Screw Eye (Size: M10 x 80) Pack of 10 | HES16PLM10 The Hobsons 316 Lag Screw Eye (HES16PLM10) is a stainless steel lag screw eye designed for compatible fixing applications requiring an integrated eye connection. Manufactured from 316 stainless steel,...
    $6.69
    $6.69

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