Softer metals, such as copper, can also resist vibration in machines, helping to keep connections secure. Of course, coppers can also be hard if treated. Steel is similar. Low-carbon steel washers are common, as is stronger steel washers. Their purpose is to help threaded fasteners do a more reliable job while protecting the surface from damage during tightening. A perfect example of this is when the material you’re fastening to is weaker than the fastener material itself. Without a washer, the fastener can distort the material it’s being installed into. To prevent this, you need a large bearing surface, which the washer provides.

Even if the fit is a bit larger than the diameter of the bolt, with the washers help nut bolt can be tightened easily. Accu's Plastic Retaining Washers are a lightweight and cost-effective alternative, available in HDPE, Nylon and PA (Polyamide). Captive Fastener Installation Guide. The step washer offering features shoulder bushes made from Nylon 6/6, These nylon sleeve washers are a self-lubricating option, great for anything that pivots or rotates. The are low coefficient of friction, and resistant of moisture, dirt and most chemicals. We also have a countersunk sleeve that is frequently applied in electro technical environments, and is compulsory by law in many countries. It prevents electrical corrosion with countersunk head screws. Shoulder Washers, also known as Insulation Sleeves or Shoulder Bushes, are designed to provide electric and heat insulation for assemblies where this is a fundamental requirement. A type of stepped washer, they are made from a variety of materials and colours, these products are self lubrication, corrosion and abrasion resistant. For applications where retaining fasteners are required to be fitted to equipment such as safety guards, Push-On Washers can be used to achieve compliance with EU machine Directive 2006/42/EC.This retainer washer range includes options with internal and external teeth with a tapered design. The washer easily slides on to the screw (or bolt) and is retained by the screw once assembled. Self retaining washers cold form and fully enter the pitch of the screw to provide improved sealing. Yellow to orange colour depending on a proprietary process used. Will range from matt to bright finish depending on base metal. Good corrosion resistance and high tarnish resistance. These plastic retaining washers allow for preliminary mounting of the screw (or bolt) before securing with a nut. They are ideal when pre-assembly of the screw and washer is required. They also help reduce assembly time and cost. These components can also be used alongside standard Precision Screws, and are particularly useful for creating Screw and Washer pre-assemblies.

This washer is in the shape of a ring cut by spring steel. Its ends are slightly raised up and down due to spring tension. These washers are placed above or below the nut or bolt and tighten so much that both their ends face each other and become leveled.This product is a light-duty and reusable solution to screw captivation, if a more robust and permanent fastening is required, Accu's Captive Washersmay be more suitable. Materials Our Anti-Loss Retaining Washers are available in all kinds of internal diameters and screw sizes between M2 & M16 to suit your specific needs and requirements. For all currently available options or to request a free sample for testing purposes, please see the product table below. Passivation is a process designed to remove foreign metals from the surface of stainless and corrosion resistant steels.

For an introduction to Captive Screws and Captive Washer best practices, our Captive Screw Installation Guide is a good reference tool. Push-On Washers are commonly used to create a permanent hold within an assembly, for example acting as a Retaining Washer to secure a screw onto a panel. Types of metal washers vary, as do the metals. Stainless steels vary as well, depending on their grade. For instance, some stainless steels are not very corrosion resistant, while others are. You can learn about grades in our guide Understanding stainless-steel grades. These washers are used to prevent a nut from loosening. These are used where there is vibration, or jolts occur. This puts pressure against the nut, preventing the latter (the nut) from turning and working loose.We also offer a flat washer made from Polyvinyl Chloride (PVC), which has high stiffness and fantastic electrical properties - making it ideal for use in a range of electrical assembly applications. This PVC washer provides abrasion and moisture resistance. Its shape is like a round ring. Before tightening the nut and bolt, it is fitted on a stud or bolt. It is used to secure the tightness of a joint, screw, etc. and it becomes easy to open the nut-bolts and their threads are protected. The range includes a Thermoplastic Rubber Washer (TPR) that has improved chemical resistance, sealing characteristics and vibration resistance. These are a great solution for oil, gas and automotive industries. These flat rubbers are manufactured to DIN 125 standard. They also benefit from flame resistance to UL94 HB standard.

This type of washer is intended to be a permanent fastening, and is therefore not suitable for re-use. Reactivate your water supply, keep towels in place in preparation for any leakage, and test. Once satisfied there is no leakage, you may also reactivate your mains. Washers are available in metal, rubber and plastic. When high strength is needed, go with a metal washer. Rubber is ideal when flexibility and a tight seal are needed. Plastic is perfect for smaller applications. An example is electronics, which need washers that resist vibrations. Nylon vs. rubber washers Now, you have access to the tap’s internal body. Here, you should remove the brass circlip from the tap body and push down the spindle, which will release the valve mechanism. You can take this opportunity to maintain your tap by cleaning all components with descaler. You can wash the rubber washer and O rings in warm soapy water to remove limescale. As you will see, the handle of the tap turns to move one disc over the other, opening a hole for the water to pass through. The retaining washer here acts just like a normal tap washer, providing a seal between the tap and ceramic disc. They are kept in place by water pressure. A more premium retaining solution can be found in Accu's specialist range of Washers For Captive Screws.Retaining Washers, also known as Retention Washers or Anti-Loss Washers, are primarily used to hold screws and bolts in place during assembly and have a design that grips the outside of screw or bolt shank. They also provide insulation. cushioning and spacing. They help insulate fastening assemblies from moisture and electricity. For a lightweight and reusable variant of this component, please see Accu's Retaining Nylon Washers range.