Overview Reviews Product Description -by bearing manufacturer: FKL: KM 4 Product Videos Custom Field d M20X1 mm D 32 mm B 6 mm N 2 mm M 4 mm Product Reviews Write a Review Write a Review × Z&S Locknuts KM 4 [Z&S] Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *