With an increased O.D., thickness and bearing area, this washer is ideal for heavier duty applications involving the application of higher tightening torques. The Heavy Section helical spring lock washer contributes significantly to the maintenance of tightness or tension in applications involving screws, bolts and nuts under high loads.

With a further increase in O.D., thickness and bearing area, the Extra-Duty helical spring lock washer absorbs exceptionally high torques and retains tension under heavy loads.

The smaller O.D. on the Hi-Collar helical spring lock washer accommodates confined areas. The increased thickness sustaines the washer's overall locking effectiveness. The Hi-Collar is recommended for use with socket head cap screws and where there are clearance limitations.

With a significant reduction in washer thickness and a slight reduction in O.D., the Light helical spring lock washer is sometimes used in applications involving the reduced torques and lighter loads often associated with thin or fragile materials, or where head height clearance is limited.

The smaller O.D. on the Hi-Collar helical spring lock washer accommodates confined areas. The increased thickness sustaines the washer's overall locking effectiveness. The Hi-Collar is recommended for use with socket head cap screws and where there are clearance limitations.