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<p>Spanners are one of the most common hand tools found in any tool bag, box or kit and are used for fastening and loosening nuts or bolt heads with a hexagonal shape. They are typically made from hardened chrome vanadium steel or beryllium copper, and the most common types can comprise of a ring-style spanner on one end and an open jaw spanner on the other (a combination spanner), or two open jaw ends (an open-ended spanner).</p><p>The ring end recess, if present, is generally a six-point or twelve-point opening and sometimes offers a ratchet mechanism that helps apply maximum force with minimal user effort. This will most likely match the size of the open jaw end, but always check each tool. The open jaw is typically offset by 15 degrees to allow for a greater freedom of movement during operation, which also allows a higher torque force to be applied to help turn the chosen fastening.</p><p>Spanners are available in a variety of metric (mm) and imperial (in) sizes to allow for greater functionality across a wider range of applications. Our range includes products from leading brands such as Bahco, Facom, Ega-Master, Stanley, Wera & RS PRO.</p><h2>How do spanners work?</h2><p>In the case of open jaw spanners, these tools work by holding the opposite sides of a nut or bolt to channel the physical movement of the user, applying torque force to the fastening so that it can be turned. The same rules apply to ring-style spanners, the only difference being that the ring fully encases the fastening rather than applying force to opposite sides. Depending on the material they are made from, spanners can often withstand large amounts of torque being applied to stubborn fasteners.</p><h2>Type of spanners</h2><ul><li>C Spanners - Also known as hook spanners, these are high-quality tools designed to loosen retaining rings and adjusting chains. View our range of <a href="https://uk.rs-online.com/web/c/hand-tools/spanners-sockets-wrenches/c-spanners/">C Spanners here</a>.</li><li>Combination Spanners - A combination spanner will have the open jaw spanner on one end and the ring-style spanner on the other. View our range of <a href="https://uk.rs-online.com/web/c/hand-tools/spanners-sockets-wrenches/hook-spanners/">Hook Spanners here.</a></li><li>Hook Spanners - These tools have one or several pins or 'hooks' that are designed to drive spanner-head screws, threaded collars and retainer rings, shafts, and so on.</li><li>Open Ended Spanners - As the name suggests, these tools have an open jaw at each end, however they often differ in size.</li><li>Ratchet Spanners - Ratchet spanners allow the angle of the tool to be adjusted by the user without removing it from the fastening. Also known as socket wrenches: view our range in our socket wrenches section.</li><li>Ring Spanners - Ring-style spanners have enclosed openings to grip the complete fastening rather than just opposite sides. Double ended ring spanners often have offset handles to improve access to nuts and bolts.</li></ul><h2>Who uses spanners?</h2><p>Spanners are used across many industries, including:</p><ul><li>Mechanics</li><li>Electricians</li><li>Network Engineers</li><li>DIY Enthusiasts</li></ul>

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Spanners | Hand Spanners | RS Components

Spanners

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Combination Spanners | RS Components

<p>Combination spanners, also known as combi spanners, are hand tools used for tightening and loosening nuts or bolt heads with a hexagonal shape. They are typically made from hardened chrome vanadium steel or beryllium copper and typically comprise of a ring on one end and an open jaw on the other. </p><p>The ring end recess is generally a six-point or twelve-point opening and sometimes offers a ratchet mechanism that helps apply maximum force with minimal user effort. Combination wrenches are available in most metric (mm) and imperial (inch) sizes to allow for greater functionality across a wider range of applications. </p><h2>Popular combination spanners</h2><ul><li>Ratchet End / Open-End - Consists of a ratchet ring spanner at one end and a standard open end at the other.</li><li>Height Safe spanner - A ring hook is attached to the handle that can be securely attached to a wrist strap for working at height</li><li>Non-sparking spanner - Ideal for use in potentially explosive environments such as Power stations, Paint Manufacturing, Oil Plants, Distilleries, Fire-fighting, Aerospace industry.</li></ul><h2>Imperial Spanners</h2><p>Imperial spanners use the AF (Across Flats) system, where the measurement is taken between two parallel sides of the fastener. An inch spanner will fit an inch fastener. </p><h2>Metric Spanners</h2><p>Metric refers to the size of the thread rather than the size of the head of the fastener. Common sizes include M6, M8, M10 and M12. The ’M’ prefix is short for metric while the number indicates the width of the threaded section. For example, while there can be a few variations in millimetres, you would normally see a 10 mm spanner being used for an M6 fastener. </p><h2>Typical Application: </h2><p>Combi spanners are used by:</p><ul><li>Mechanics</li><li>Electricians</li><li>Network Engineers</li><li>DIY Enthusiasts</li></ul>

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Facom Combination Spanners | RS Components

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Open Ended Spanners | RS Components

<p>An open-ended spanner is a hand tool used to tighten or loosen nuts, bolts or any other fasteners and is also know as a crows foot spanner. The open ends often sit at a 15-degree angle to the spanner shaft which allows it to be used in confined spaces where there is little room for movement. This type is spanner is a common piece of equipment, found in most tool collections due to the versatile nature of them.</p><p>This spanner provides the user with increased grip and torque when turning fasteners. Some have one head, and some have dual heads ranging in size as well as the tool length. The longer the tool, the bigger the head to give the user more leverage for undoing stubborn fasteners and allowing greater torque application.</p><h3>Advantages of open-ended spanners</h3><ul><li>They can be used on most types of fasteners with a secure fit and reduced instances of rounding</li><li>Versatile and can be used across a wide range of applications</li><li>The spanners come in different sizes to suit your needs</li><li>Ideal when working in confined spaces</li></ul>

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Ratchet Spanners | RS Components

<p>A ratchet spanner or wrench uses a mechanism which allows an open-ended, flare or ring head to turn a fastener in one direction but not the other while remaining fitted to the fastener head. By turning the spanner over or flicking a lever, it changes the direction of movement. They are an essential tool in any toolbox as it can tighten and loosen a nut or bolt, and by applying the correct amount of torque to the fastening, it can save time and effort. Some manufacturers choose to etch the arrows of the torque direction near the lever, making it easier for the user to identify the direction to tighten or loosen in. Ratchet spanners are available in a variety of metric and imperial sizes</p><h2>Common ratchet spanner head types:</h2><ul><li>Ring Head: The most frequently used type of ratchet head. They are especially useful as they apply force to all sides of the fastener, offering additional grip to avoid coming off the nut or bolt whilst the tool is in use.</li><li>Reversible: The simple reversing mechanism allows to user to adjust the direction of the ratchet simply by moving the lever across on the tool.</li><li>Flare Nut Spanner: Also known as a 'crow's foot' spanner or a 'brake nut' spanner, it provides contact at six points on the fastener, allowing a secure grip.</li><li>Open Ended Spanner: An essential spanner for any tool box, it can also come with a ratchet mechanism meaning this versatile tool can be used across various settings.</li><li>Open Ended Ratchet: This ratchet has an altered profile which can catch the fastening in one direction to apply the torque to loosen or tighten it. It can only move in one direction and can be turned over to change the direction of the torque application.</li></ul>

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Ring Spanners | RS Components

<p>Ring spanners are hand tools used for tightening and loosening nuts or bolt heads with a hexagonal shape. They are typically made from hardened chrome vanadium steel or beryllium copper and typically comprise of a ring on one end and an open jaw on the other. Our Includes leading brands such as; Bahco, Eg-Master, Facom, Gear Wrench, Gedore, Stahwille & RS PRO</p><h2>Types of Ring Spanners</h2><p>The ring end recess is generally a six-point or twelve-point opening and sometimes offers a ratchet mechanism that helps apply maximum force with minimal user effort. Ring spanners are available in most metric (mm) and imperial (inch) sizes to allow for greater functionality across a wider range of applications. </p><h2>How do ring spanners work? </h2><p>Ring spanners rely upon the physical strengths of the user to deliver accurate force when attaching the recessed head to the fastener and rotating clockwise or anti-clockwise. Depending on the material they are made from, they can often withstand large amounts of torque being applied to stubborn fasteners.</p><h2>Popular ring spanners</h2><p>Ratchet End / Open-End - these consist of a ratchet ring spanner at one end and a standard open end at the other. </p><p>Height Safe spanner - have a ring hook attached to the handle that can be securely attached to a wrist strap for working at height</p><p>Non-sparking spanner - ideal for use in potentially explosive environments such as Power stations, Paint Manufacturing, Oil Plants, Distilleries, Fire-fighting, Aerospace industry. </p>

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