Although gaskets and washers share some similarities, they serve different functions. Here APM Hexseal discusses why gaskets and washers are often assumed to be the same thing and how they serve very different purposes.
Gaskets are used to prevent leaks around mating surfaces, whereas washers are used to distribute the load of a threaded fastener. Most washers won’t have the ability to prevent fluid or gas leakage; therefore, gaskets are the better choice for sealing applications.
The shape and size of washers are also different compared to gaskets. Most washers are small and feature a uniform circular shape to enable them to fit around bolts. Gaskets are not used with bolts, meaning they are available in a wider variety of shapes and sizes. In terms of materials, washers are almost always made of metal; whereas gaskets can be made of metal, metal alloys, rubber and other materials.
Common types of gaskets include flange gaskets, constant seating gaskets, spiral wound gaskets and
soft-cut gaskets. Gaskets are used in nearly every industry, with applications including aerospace equipment, wind turbines, medical equipment, electronics, automotive and heavy equipment.
Common types of washers include plain washers, locking washers, spring washers and torque washers. Bonded sealing washers are used throughout many industries such as aerospace, agriculture, automotive, construction, marine, military and mining. Their durability and effectiveness also make them suitable for applications such as HVAC equipment, marine electronics, construction and industrial equipment, hydraulics and braking systems.
Custom moulded gaskets from APM
Moulded gaskets feature high durability and can withstand a wide range of operating environments. APM Hexseal is a provider of durable high-quality sealing hardware, including custom moulded gaskets and washers, with an experienced team of designers, engineers, and manufacturing experts, who can work with users to develop a reliable, rugged and high-quality gasket – based on specific application requirements.
Along with custom moulded gaskets, APM also offers a self-sealing hexagonal nut, the Seelnut®. This innovative product is made from high-quality rubber, which is moulded into the cavity of the nut itself. These nuts feature threads moulded directly into the rubber and they provide a positive seal along the threaded section of the Seelnut®, as well as with the contact surface. This eliminates the need for gaskets, extra surface preparation and sealing compounds.
Washers from APM
As part of its product line, APM Hexseal also produces patented Seeloc® washers, featuring moulded silicone rubber bonded to specially formed stainless steel washers. These washers work in conjunction with standard studs, screws, or bolts, to create an airtight seal unlike any other. By forming an effective seal, Seeloc® washers ensure optimal performance of electrical and mechanical equipment. They are UL recognised, making them a perfect choice for NEMA rated applications.
Types of Seeloc® washers available include:
“Washers and gaskets have different functions, but whichever one you need, APM Hexseal can help with its innovative solutions.”
apmhexseal.com
Having spent a decade in the fastener industry experiencing every facet – from steel mills, fastener manufacturers, wholesalers, distributors, as well as machinery builders and plating + coating companies, Claire has developed an in-depth knowledge of all things fasteners.
Alongside visiting numerous companies, exhibitions and conferences around the world, Claire has also interviewed high profile figures – focusing on key topics impacting the sector and making sure readers stay up to date with the latest developments within the industry.
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