ITEM NAME:50 Pieces M6 Flange Nuts 304 Stainless Steel Hexagon Serrated Metric Thread Description: - 304 Stainless steel Flange nuts - A flange nut is a nut that has a wide flange at one end that acts as an integrated, non-spinning washer - These nuts have serrations on the integrated washer giving it a "locking" characteristic - This serves to distribute the pressure of the nut over the part being secured, reducing the chance of damage to the part and making it less likely to loosen as a result of an uneven fastening surface - Stable, reliable and durable, and high performance price ratio Size Chart: Overall height(m): Approx. 5.4mm/0.21'' Overall width(dc): Approx. 12.95mm/0.51'' Width measured from flat to flat(s): Approx. 9.6mm/0.38'' Package Included: 1 Bag of 50 pieces.304 Stainless steel Flange nuts. - A flange nut is a nut that has a wide flange at one end that acts as an integrated, non-spinning washer. - These nuts have serrations on the integrated washer giving it a "locking" characteristic.