Product Description
Stainless Steel Serrated Hex Flange nuts have non-rotating washers at the bottom. There are serrations under the washer. When vibration occurs, it allows the nuts to be firmly tightened and prevents them from being used with the washer or on surfaces that may be scratched.
Product Details
Drive styleExternal hex
Nut typeLocknut,hex flange
Lock typeSerrations
Thread TypeMetric
http://www.jgscrewnut.com/nuts/hex-nuts/