25pcs #12 x 2" Self Drilling Screws Roofing Screws with EPDM Washer 30mm X 26mm X 100mm 13-inch inner dia

13-inch inner dia

Valve Type: 2 Port 2 Position

Specification: Condition: 100% brand new

Mounting Hole Distance: 56 x 21mm / 2

25pcs #12 x 2" Self Drilling Screws Roofing Screws with EPDM Washer 30mm X 26mm X 100mm 13-inch inner diaDescription: 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