What are Lag Bolts & Lag Screws?

Lag bolts and lag screws, both identical to coach screws, are pivotal in precision engineering, blending strength with versatility. These fasteners are distinguished by their robust, coarse threading which extends partially along their length, and a hexagon head designed for powerful torque application. Ideal for heavy-duty tasks, they securely anchor objects to wood and other soft materials.

How Lag Bolts & Lag Screws Work.

Lagging bolts and screws shine in scenarios demanding high strength and reliability. Their rigorous design makes them perfect for woodworking, fabrication, and outdoor applications. For example, securing deck frames or attaching heavy machinery to wooden bases. In industries from architecture to furniture making, these fasteners offer unparalleled holding power, adapting to a variety of tasks with ease.

Lag Screw & Bolt Material Choices.

Our lag screws for wood are available in A2 and A4 Stainless Steel – materials renowned for their high corrosion resistance and durability. A2 stainless steel is ideal for general use, while A4, with its higher chromium content, excels in outdoor, marine or acidic environments. These material choices ensure longevity and reliability, whatever the setting for your project.

Lagging Bolt Sizes, Types, and Special Finishes.

Accu's lag bolts for wood beams span in thread size from a modest 4mm diameter up to a robust 16mm. With lengths stretching from 20mm to an impressive 300mm, our entire range ensures a perfect match for any project.

Additionally, our exclusive AccuBlack chemical blackening provides the option of matte black lag screws which are ideal for blending in with black assemblies or as an aesthetic choice mated with exposed oak timberwork.

Struggling to find a combination of dimensions right for your task? Our custom manufacturing options provide the option of custom fixings in any size and length you require, just speak to our team.

FAQs.

Q: What do lag bolts do?.

A: Lag screws and bolts are designed for securely fastening heavy items to wood or other soft materials, providing a stronger hold than regular screws due to their large size and deep threads.

Q: Why are lag bolts so strong?.

A: Their strength comes from the combination of a large diameter, deep, coarse threading, and a hexagonal head that allows for a high torque application, ensuring a robust, secure grip.

Q: Do lag bolts need pilot holes?.

A: Yes, it's recommended to drill pilot holes for lag bolts. This helps to prevent the wood from splitting and ensures a smoother installation.

Q: Are lag bolts stronger than screws?.

A: Generally, lag bolts are stronger than regular wood screws due to their larger size, deeper threads, and the increased torque that can be applied to them.

Q: Do you need washers for lag bolts?.

A: While not always necessary, using washers with lag bolts can help distribute the load more evenly, especially in softwoods or when working with oversized holes.

Q: Lag Screws vs Lag Bolts?.

A: Lag screws and lag bolts are essentially the same, often referred to as coach screws in the industry, marked by their large size and coarse threading for secure fastening in wood. To understand more about these and similar fasteners, visit our blog post "The Difference Between Carriage Bolts, Coach Bolts, Coach Screws, Lag Bolts and Lag Screws" for detailed insights.

Bespoke Lag Bolts & Lag Screws Manufacture.

High precision, bespoke manufacture of Lag Bolts & Lag Screws to customer specification. State of the art facilities specialising in both small batch prototyping and large scale manufacture.

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