25pcs #12 x 2" Self Drilling Screws Roofing Screws with EPDM Washer 30mm X 26mm X 100mm Used with sealing gaskets ring

Used with sealing gaskets ring (not included) for better sealing

Inner Diameter: 26mm/1 inch

smooth operation and good sealing performance

Mounting Hole Distance: 56 x 21mm / 2

Specification: Condition: 100% brand new

25pcs #12 x 2" Self Drilling Screws Roofing Screws with EPDM Washer 30mm X 26mm X 100mm Used with sealing gaskets ringDescription: 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