Product Description Specifications EPDM Pull Plug: Major Dia: 0.332 IN. 8.4 mm; Minor Dia: 0.25 IN. 6.4 mm; Length: 1.125 IN 28.6 mm; Hole thread: 5/16; Box Qty: 500 Max Temperature: 450° Major Diameter: 0.332 inch Metric Major Diameter: 8.4 mm Minor Diameter: 0.25 inch Metric Minor Diameter: 6.4 mm Material: EPDM Color: Black