Product Description Specifications EPDM Pull Plug: Major Dia: 0.281 IN. 7.1 mm; Minor Dia: 0.138 IN. 3.5 mm; Length: 1 IN 25.4 mm; Hole thread: 5/16-18THD; Box Qty: 500 Max Temperature: 450° Major Diameter: 0.281 inch Metric Major Diameter: 7.1 mm Minor Diameter: 0.138 inch Metric Minor Diameter: 3.5 mm Material: EPDM Color: Black