What is perm press on washer?

Perm Press on Washers

Perm press on washers, also sometimes referred to as spring washers or lock washers, are designed to provide a degree of mechanical locking or spring force. They are used in applications where vibration, thermal expansion, or other factors might cause fasteners to loosen over time. The 'perm press' part refers to a type of application where they might be employed to help prevent loosening in permanently assembled applications.

• Functionality: Primarily, perm press on washers maintain a clamping force even under stress and movement. The spring action of the washer compensates for any loss of preload in the bolted joint, thereby preventing loosening. You can read more about the functionality of washers on our website.
• Design: These washers come in various designs, including split lock washers, toothed lock washers (internal or external), and wave washers. The specific design impacts the washer's ability to resist loosening. Details on washer%20design can be found on our site.
• Material: The most common material for these washers is hardened steel, but they can also be made from stainless steel or other metals depending on the application's requirements (e.g., corrosion resistance). Explore the materials used for washers on our page.
• Applications: They're used in various industries, including automotive, machinery, and electronics. Anywhere where fastener security is critical. See more about applications of washers.
• Installation: These are designed to slip onto the bolt or screw before installation. The fastener is then tightened, compressing the washer and creating the spring force. Additional information on installation methods.