<p>Lock Washer, External Tooth, 410 Stainless Steel, Finish Plain, Fits Bolt Sizes 3/8 In., Inside Dia. 0.398 In., Outside Dia. 0.694 In., Thickness 0.040 In., Thickness Tolerance 0.032-0.04 In., Color Silver, Rockwell Hardness C40, Absorbs Shock and Vibration, For Use With Large Round, Pan, or Binding Head Screws, Meets/Exceeds ANSI B18.22.1., Refills -, Package Quantity 50</p> <p><br /><b>Features</b></p> <ul> <li>Application: Absorbs Shock and Vibration</li> <li>Color: silver</li> <li>Finish: Plain</li> <li>Inside Dia.: 0.398&quot;</li> <li>Item: Lock Washer</li> <li>Material: 410 Stainless Steel</li> <li>Outside Dia.: 0.694&quot;</li> <li>Type: External Tooth</li> <li>Fits Bolt Sizes: 3/8&quot;</li> <li>Thickness: 0.040&quot;</li> <li>Meets/Exceeds: ASME B18.21.1</li> <li>Rockwell Hardness: C40</li> <li>Thickness Tolerance: 0.032-0.04&quot;</li> </ul> <p></p>