Spring washers are a left hand helix and allow the thread to be tightened in a right hand direction only that means 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 resist 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, nyloc lock nut (nylon insert) must be used.
- Available in Mild Steel (M.S) Black, Galvanized (G.I), Hot-dip Suface
- Available in Brass, Stainless Steel (S.S) Grade 304 & 316
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