We are manufacturing Serrated Lock Washer external & internal according DIN 6797 & Customer requirements .The external serrated lock washer (Type A) -The teeth at the outer diameter of the washer which supports to lock more area to reduce loosening.The internal serrated lock washer (Type J)-The teeth at the inner diameter of the washer which is use for bolt or screw tightening.
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Wagle Estate, Thane, Maharashtra