Seatbelt & Harness Stress Plate Safety Accessories stress plate with a 7/16″ UNF thread to accept an eyebolt.& nbsp; Mounts a harnesses with eyebolt attachments.55mm x 55mm. FIA compliant.<span id=”sceditor-end-marker” class=”sceditor-selection sceditor-ignore” style=”line-height: 0; display: none;”> </span><span id=”sceditor-start-marker” class=”sceditor-selection sceditor-ignore” style=”line-height: 0; display: none;”> </span><br>