5/16 L9 USS Tension Flatwasher Yellow Zinc Plated Domestic USA (4200)

5/16 L9 USS Tension Flatwasher Yellow Zinc Plated Domestic USA (4200) . L9® High Tension USS pattern flat washers are designed for use in high stress, severe service environments. The highest mechanical strength off-the-shelf fastening system available, its special features control torque-tension characteristics to develop high clamp loads when using properly controlled tightening methods.