Screw Fixer Grommet - Natural, Folding Legs - Compatible Thread Sizes #8 ; Square Size 8.0 mm | 0.315 in ; Nylon

This spacer locks the board in when it is screwed down. The bottom retracts and extends lateral wings to fix in place. It is compatible with a 4.2mm self tapping screw. This item is manufactured with material rated UL94 V-2