#12 x 2-1/2" Self Drilling Screws, 50pcs Roofing Screws with EPDM Washer OD 78.1mm to ID 66.1mm Tightening Torque: 9-12 • m

Tightening Torque: 9-12 • m

* Wide application in DIY hand-making

moisture resistance

Shank Diameter: 5mm(13/64 inch)

Mirror Size:  18x13

#12 x 2-1/2" Self Drilling Screws, 50pcs Roofing Screws with EPDM Washer OD 78.1mm to ID 66.1mm Tightening Torque: 9-12 • mDescription: 1. Material: Both the screw and the metal washer are made of carbon steel, a zinc plated surface finish, which is corrosion resistant; the black washer is made of EPDM, which is wear resistant and oxidation resistant. 2. Advantages: The hex washer head has a flange with an EPDM rubber washer on the bottom to prevent leaks, loosening and damage to mating surfaces. The underside of the hex head provides a large flat bearing surface that