EJOT SpringHead®

Every screw connection loses clamp load after assembly due to relaxation in the joint. If the clamp load falls below a critical level, the connection fails. These failures can be prevented by increasing the elasticity in the screw connection, e. g. with the integration of spring elements into the screw connection. The innovative EJOT SpringHead^® geometry realises this resilient feature and compensates for joint relaxation without additional, conventional spring elements such as conical spring washers. The spring integrated in the screw head enables a better clamp load retention under dynamic and thermal stress as well as a permanent electrical contacting. 

EJOT SpringHead^® is ideal for direct fastening into metals, e. g. with the ALtracs^® Xt  screw. When the clamping part is made of steel, the SpringHead^® can be used without a washer. For clamping parts made of plastic, aluminium or copper, it is recommended to use the SpringHead^® with a captive washer for optimum
clamp load retention. Two versions (soft & hard) with different initial clamp load levels are available for each screw size. The EJOT SpringHead^® geometry is also compatible with metric threads. Other thread geometries are available upon request.