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Precision Screws.

Precision Screws

What are Precision Screws?

Screws, a fundamental component in precision engineering, are helical fasteners designed for assembling materials with high precision. Typically characterised by a threaded cylindrical shaft topped with a head, a threaded screw comes in various profiles including Countersunk, Cap, Button, Hexagon, Shoulder Pan, and Grub to name a few. Each type serves a specific purpose, providing unique advantages in diverse engineering applications. The intricate design of screws and bolts allows for efficient distribution of forces and secure fastening, making them indispensable in precision engineering projects, especially when screws and nuts are used together with washers.

How Screws Work.

Screws and bolts operate on the simple principle of converting rotational force to linear motion. This mechanism is crucial in applications requiring firm and precise attachment, such as in mechanical assemblies, and electronics. For instance, a countersunk screw is ideal for creating a smooth surface finish, while hexagon bolt screws are suited for heavy-duty applications requiring high torque. The versatility of metal screws, ranging from small-scale electronics assembly to large projects, underscores their universal utility.

Materials of Screws.

Accu's screws are available in a variety of materials, including A2 & A4 stainless steel, RENY, PPS, PEEK, polycarbonate, nylon, aluminium and titanium. Each material offers distinct benefits: Stainless steel metal screws provide corrosion resistance, making them ideal for outdoor applications, while PEEK screws offer high thermal and chemical resistance, suitable for harsh environments. The selection of material is critical to ensure optimal performance and longevity of the threaded screw in its intended application.

Sizes and Types of Screws.

Accu offers screws for metal and plastics in a vast range of sizes and types, accommodating diverse engineering needs. Our screw measurements range from a tiny M1.2 (1.2mm) to a robust M30 (30mm)  thread size, with lengths spanning from 2mm to 300mm. Choosing the appropriate screw diameter is crucial to align not just the tapped hole but also other interacting components.

Accu also proudly provides additional finishes like AccuBlack chemical blackening for achieving reflection-free, matte black screws and AccuLock thread locking patches offering the pre-application of thread lock to aid in resistance against loosening.

We also offer custom manufacturing options to meet specific requirements and screw dimensions. Whether it’s small screw fixings or heavy-duty screws, our offering ensures you find the exact match for your project.


Q: How to measure a screw?.

A: To measure screws and bolts, you'll need to determine their diameter, length, and thread pitch. The diameter is measured at the outer thread, the length from the head to the end, and the thread pitch is the distance between adjacent threads. To read in detail how to measure a screw, give our guide a read.

Q: How to remove a screw with a stripped head?.

A: There are many ways to remove a screw with a stripped head. Our in-depth guide details 12 ways to remove a stripped screw, but one of the easiest methods is to try to place a rubber band between the drive and screwdriver tip to increase friction.

Q: Difference between bolt and screw?.

A: Bolt vs screw is a discussion as old as time as the two terms are always used interchangeably. The most popular assumption lies in usage; is it thought that screws are generally used to fasten materials by digging into them, while bolts are used alongside nuts to clamp components together without the need for internal threads.

Q: What are screws made of?.

A: Screws are made from a variety of materials, each selected for its unique properties to suit specific applications. Common materials include stainless steel, titanium, aluminium and various plastics. In terms of anatomy, screws are made up of a tip, threaded shaft, head and drive type.

Q: Best screws for outdoor use?.

A: The best screws for outdoor use are stainless steel screws, particularly A4 stainless steel, known for its high corrosion resistance, making it ideal for withstanding harsh outdoor conditions. Knowing where to buy screws online and in what materials can be difficult, that's why Accu proudly provides expert advice direct from our engineers to help you buy engineering components, right, the first time around.

Bespoke Precision Screws Manufacture.

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

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