HLS-14SS HEICO Fastening Systems HEICO-LOCK Washers , Manufacturer Part#: HLS-14SS , Manufacturer: HEICO Fastening Systems , Brand: HEICO-LOCK Washers , UOM (Inch or Metric): Metric , Material: Stainless Steel , Finish: AISI 316L , Bolt Size: 9/16 Inch UNC (M14) , Inside Diameter: 0.600 Inch (15.20mm) , Outside Diameter: 0.910 Inch (23.00mm)