DIN 127A Spring Washer ISO 7090 Washer Stainless Steel 304 A2 Purification M2-M12

Description

DIN 127A Spring washer is a left-hand helix and allows the thread to be tightened in a right-hand direction only, i.e. a clockwise direction. When a left-hand turning motion is applied, the raised edge bites into the underside of the bolt or nut and the part that it is bolted to, thus resisting turning. Therefore, spring washers are ineffective on left-hand threads and hardened surfaces. Also, they are not to be used in conjunction with a flat washer under the spring washer, as this isolates the spring washer from biting into the component that will resist turning. Where a flat washer is required to span a large hole in a component, a nylon nut (nylon insert) must be used. Ever Hardware provides custom made fasteners and customizable packaging.
The use and effectiveness of spring lock washers have been in a debate of late, with some publications advising against their use on the grounds that, when tight, the washer is flat against the substrate and gives no more resistance to rotation than a normal washer at the same torque. NASA researchers have gone as far as to say “In summary, a lock washer of this type is useless for locking.” However, a spring washer will continue to hold the bolt against the substrate and maintain friction when loosened slightly, whereas a plain washer will not.

Stainless steel DIN 127A spring washer does not readily corrode, rust or stain with water as ordinary steel does. However, it is not fully stain-proof in low-oxygen, high salinity, or poor air-circulation environments. There are different grades and surface finishes of stainless steel to suit the environment the alloy must endure. Stainless steel is used where both the properties of steel and corrosion resistance are required.