Zinc Alloy Round Base T Nut Three Brad Hole Furniture Tee Nut
 
Size: 5/16" 3/8" M6 M8 M10 M12
 
Dia./Thread Size: 5/16-18, 3/8-16,  M6-1.0, M8-1.25, M10-1.5, M12-1.75