M12 x 19mm Coach Screws (Lag Screws) – Strong Timber Fasteners for Structural Brackets and Heavy Hardware

M12 x 19mm Coach Screws (Lag Screws) – Strong Timber Fasteners for Structural Brackets and Heavy Hardware

M12 x 19mm Coach Screws, also known as lag screws, are heavy-duty timber fasteners designed for securing substantial wood components and attaching heavy hardware to timber. With a Hot Plate Galvanized finish, hex head, coarse threads, and thick shank, they provide a strong fixing solution for structural brackets, heavy ironmongery, machinery feet, beams, floor joists, structural posts, fencing, retaining walls, and large outdoor gates.

The hex head allows high-torque tightening using a spanner, socket, or impact driver. Deep, aggressive coarse threads are designed to bite deeply into wood fibres for strong pull-out resistance, while the thick shank is much stronger and thicker than standard wood screws, helping prevent snapping under heavy loads.

What Are M12 x 19mm Coach Screws and Lag Screws?

M12 x 19mm Coach Screws are substantial coach screws for wood used for heavy-duty timber fastening and hardware attachment. They are also commonly referred to as lag screws, making terms such as lag screw sizes, lag screw vs wood screw, and lag screw vs lag bolt relevant when identifying this type of fastener.

The product features an M12 x 19mm specification, a hex head, coarse threads, a thick shank, and a Hot Plate Galvanized finish. It is available in multiple lengths from 50mm to 300mm, with corresponding minimum threaded lengths from 30mm to 180mm.

Key Features

Hex Head

The hex head provides a secure driving surface for high-torque tightening. A suitable spanner, socket, or impact driver can be used for installation.

This makes the product suitable for applications where substantial tightening force is required.

Coarse Threads

The deep, aggressive coarse threads are designed to bite deeply into wood fibres for maximum pull-out resistance. This makes the fastener particularly suitable for substantial timber fastening applications.

Thick Shank

The thick shank is much stronger and thicker than standard wood screws and is designed to help prevent snapping under heavy loads.

Hot Plate Galvanized Finish

The specified finish is Hot Plate Galvanized, forming part of the product’s stated specification.

Available M12 Coach Screw and Lag Screw Sizes

The M12 x 19mm range includes the following overall lengths:

• 50mm
• 55mm
• 60mm
• 65mm
• 70mm
• 75mm
• 80mm
• 90mm
• 100mm
• 110mm
• 120mm
• 130mm
• 140mm
• 150mm
• 160mm
• 170mm
• 180mm
• 190mm
• 200mm
• 220mm
• 240mm
• 250mm
• 260mm
• 280mm
• 300mm

The corresponding minimum threaded lengths are:

Overall Length	Minimum Threaded Length
50mm	30mm
55mm	33mm
60mm	36mm
65mm	39mm
70mm	42mm
75mm	45mm
80mm	48mm
90mm	54mm
100mm	60mm
110mm	66mm
120mm	72mm
130mm	78mm
140mm	84mm
150mm	90mm
160mm	96mm
170mm	102mm
180mm	108mm
190mm	114mm
200mm	120mm
220mm	132mm
240mm	144mm
250mm	150mm
260mm	156mm
280mm	168mm
300mm	180mm

These are the supplied overall and minimum threaded-length specifications for the product range.

Coach Screws 150mm and Longer Sizes

The 150mm coach screw has a 90mm minimum threaded length. Longer options include 160mm, 170mm, 180mm, 190mm, 200mm, 220mm, 240mm, 250mm, 260mm, 280mm, and 300mm.

The 300mm version has a 180mm minimum threaded length, making it the longest listed option in this M12 range.

Coach Screws for Wood and Heavy Timber

M12 x 19mm Coach Screws are designed for substantial wood-fixing applications. The coarse threads provide deep engagement with timber, while the thick shank provides a stronger screw body than standard wood screws.

The listed applications include:

• Heavy wooden beams
• Floor joists
• Structural posts
• Thick timber fencing
• Retaining walls
• Large outdoor gates
• Heavy ironmongery
• Machinery feet
• Structural brackets

These applications make the product suitable for construction, carpentry, landscaping, fencing, gate installation, maintenance, workshops, commercial projects, and other heavy-duty timber work.

Structural Brackets and Heavy Hardware

M12 x 19mm Coach Screws are suitable for mounting structural brackets and heavy hardware to wood.

The supplied applications specifically include heavy ironmongery, machinery feet, and structural brackets.

The hex head provides high-torque tightening capability, while the coarse threads and thick shank support the heavy-duty nature of these fixing applications.

Timber Beams, Floor Joists and Structural Posts

The product is specified for securing heavy wooden beams, floor joists, and structural posts.

The wide range of lengths, extending from 50mm to 300mm, provides options for different timber dimensions and fixing requirements.

Fencing, Retaining Walls and Large Gates

These coach screws are also specified for fastening thick timber used in fencing, retaining walls, and large outdoor gates.

The available lengths allow the range to accommodate different timber assemblies, from shorter fixing requirements through to substantially longer 300mm options.

Coach Screws and Plugs for Masonry

The product also supports the specified masonry anchoring application.

Items can be fixed into concrete or brick when the coach screw is paired with an appropriate nylon wall plug.

For timber applications, the coarse threads engage directly with the wood fibres. For the specified masonry application, an appropriate nylon wall plug forms part of the fixing arrangement.

Lag Screw vs Wood Screw

The term lag screw is commonly associated with substantial wood-fixing applications. M12 x 19mm Coach Screws are suitable for heavy timber applications because their supplied specification includes a thick shank and deep, aggressive coarse threads designed for wood engagement.

The product is specifically identified as a coach screw, while “lag screw” is also a relevant common term for this type of heavy-duty fastener.

Lag Screw vs Lag Bolt

Searches for lag screw vs lag bolt commonly arise when identifying heavy-duty timber fasteners.

For this product, the correct product identity remains M12 x 19mm Coach Screws. The product specification supplied for this range identifies the fastener as a coach screw with a hex head, coarse threads, thick shank, and Hot Plate Galvanized finish.

Lag Screw Sizes

Lag screw sizes can vary by diameter and length. For this product, the stated specification is M12 x 19mm, with overall lengths available from 50mm to 300mm.

The minimum threaded lengths range from 30mm to 180mm, depending on the overall length selected.

Choosing the Right M12 Coach Screw Length

The appropriate length depends on the materials and fixing arrangement.

Important considerations include:

• Timber thickness
• Thickness of attached hardware
• Required fixing depth
• Required threaded engagement
• Type of timber assembly
• Intended application
• Whether the fixing is being made into timber or used with a wall plug for masonry

The range provides sizes from 50mm through 300mm, allowing different variations to be selected for different applications.

Common Mistakes When Selecting Coach Screws

Confusing Overall Length With Threaded Length

Overall length and minimum threaded length are separate specifications. For example, the 150mm version has a 90mm minimum threaded length, while the 300mm version has a 180mm minimum threaded length.

Selecting Only by Length

The longest available size is not automatically the correct fixing. The selected length should correspond to the actual timber and hardware arrangement.

Confusing M12 With Other Coach Screw Sizes

M8 coach screws, M10 coach screws, M12 coach screws, and M14 coach screws are different size specifications. This product is specifically the M12 x 19mm Coach Screw.

Confusing Coach Screws With Other Fasteners

Terms such as lag screw, lag bolt, wood screw, and position screw may appear in searches for related timber fasteners. The product described here remains specifically an M12 x 19mm Coach Screw.

Using a Masonry Fixing Without the Appropriate Plug

For the specified concrete and brick application, an appropriate nylon wall plug is required with the coach screw.

Product Specifications

Specification	Details
Product	M12 x 19mm Coach Screws
Common Term	Lag Screws
Head Type	Hex Head
Finish	Hot Plate Galvanized
Thread Type	Coarse
Shank	Thick
Available Lengths	50mm–300mm
Minimum Threaded Lengths	30mm–180mm
Timber Applications	Beams, joists, structural posts, fencing, retaining walls, large gates
Hardware Applications	Heavy ironmongery, machinery feet, structural brackets
Masonry Application	Concrete or brick with appropriate nylon wall plug
Tightening Tools	Spanner, socket, or impact driver

The specifications are based on the supplied M12 x 19mm Coach Screw product details.

M12 x 19mm Coach Screws for Construction and Commercial Use

The M12 x 19mm Coach Screw range is suitable for construction, carpentry, landscaping, fencing, gate installation, maintenance, workshops, commercial projects, and heavy-duty timber fastening.

The listed applications include structural timber, fencing, retaining walls, large gates, heavy hardware, structural brackets, and specified masonry anchoring.

The extended range up to 300mm provides longer fastening options for substantial timber assemblies.

M12 Coach Screws in Ghana

CETECH Ghana operates both online and physical offline stores in Ghana and supplies products to individual customers, businesses, contractors, technicians, institutions, commercial buyers, and industrial buyers where relevant.

M12 x 19mm Coach Screws can therefore serve individual construction projects, carpentry work, commercial developments, maintenance requirements, contractor projects, and industrial procurement.

Where applicable, CETECH Ghana also supports bulk supply, industrial sourcing, consultation, and supply support.

Bulk M12 Coach Screw Supply

The 50mm–300mm size range makes these coach screws suitable for procurement where multiple lengths are required across a project or several projects.

Bulk applications can include:

• Timber construction
• Structural bracket installation
• Fencing projects
• Large gate construction
• Retaining walls
• Landscaping
• Heavy hardware installation
• Workshop applications
• Commercial maintenance

CETECH Ghana supports bulk supply and industrial sourcing where applicable.

Why Choose M12 x 19mm Coach Screws?

M12 x 19mm Coach Screws combine a substantial fastening specification with features designed for heavy timber applications:

• M12 x 19mm specification
• Hex head
• Hot Plate Galvanized finish
• Deep, aggressive coarse threads
• Thick and strong shank
• High-torque installation
• 50mm–300mm available lengths
• 30mm–180mm minimum threaded lengths
• Suitable for beams, joists and structural posts
• Suitable for fencing, retaining walls and large outdoor gates
• Suitable for structural brackets and heavy hardware
• Suitable for specified masonry anchoring with an appropriate nylon wall plug

Frequently Asked Questions

What are M12 x 19mm Coach Screws?

M12 x 19mm Coach Screws are heavy-duty timber fasteners with a hex head, coarse threads, thick shank, and Hot Plate Galvanized finish. They are designed for substantial timber and heavy hardware fastening applications.

Are M12 x 19mm Coach Screws also called lag screws?

Yes. Lag screw is a relevant common term for this type of heavy-duty timber fastener. The product identity remains M12 x 19mm Coach Screws.

What lengths are available?

The range includes 50mm, 55mm, 60mm, 65mm, 70mm, 75mm, 80mm, 90mm, 100mm, 110mm, 120mm, 130mm, 140mm, 150mm, 160mm, 170mm, 180mm, 190mm, 200mm, 220mm, 240mm, 250mm, 260mm, 280mm, and 300mm.

What is the minimum threaded length of the 150mm coach screw?

The 150mm version has a 90mm minimum threaded length.

What is the minimum threaded length of the 300mm coach screw?

The 300mm version has a 180mm minimum threaded length.

Can M12 coach screws be used for wood?

Yes. The supplied specification describes deep, aggressive coarse threads designed to bite deeply into wood fibres and a thick shank designed to resist snapping under heavy loads.

Can these coach screws be used in concrete or brick?

For the specified masonry application, they can be used with an appropriate nylon wall plug for fixing into concrete or brick.

What tools can be used to tighten the hex head?

A spanner, socket, or impact driver can be used for high-torque tightening.

What finish do these coach screws have?

The specified finish is Hot Plate Galvanized.

Are 20mm coach screws available in this range?

No. The supplied M12 range starts at 50mm, so 20mm is not listed as an available length.

Are M8, M10 and M14 coach screws the same as M12 coach screws?

No. M8, M10, M12, and M14 represent different size specifications. This product is specifically the M12 x 19mm Coach Screw.

M12 x 19mm Coach Screw Checklist

• Product: M12 x 19mm Coach Screws
• Common term: Lag Screws
• Head: Hex Head
• Finish: Hot Plate Galvanized
• Thread: Coarse
• Shank: Thick
• Length range: 50mm–300mm
• Minimum threaded length: 30mm–180mm
• Timber uses: Beams, joists, structural posts, fencing, retaining walls and large gates
• Hardware uses: Heavy ironmongery, machinery feet and structural brackets
• Masonry: Concrete or brick with an appropriate nylon wall plug
• Installation: Spanner, socket, or impact driver
• Supply: Individual, commercial, bulk and industrial sourcing through CETECH Ghana where applicable
  M12 x 19mm Coach Screws provide a substantial fastening solution for heavy timber construction and hardware attachment. With 25 available lengths from 50mm to 300mm, minimum threaded lengths from 30mm to 180mm, a hex head, coarse threads, thick shank, and Hot Plate Galvanized finish, they provide a broad range of options for heavy-duty timber fixing applications in Ghana.