#14 x 3-9/16" Self Drilling Screws, 50pcs Roofing Screws with EPDM Washer 3/8" X 7/16" Overall Size: 22mm x 20

Overall Size: 22mm x 20

1/2 Inchfemale thread diameter

2 x 9mm / 0

Installation Method : Screw fixing

#14 x 3-9/16" Self Drilling Screws, 50pcs Roofing Screws with EPDM Washer 3/8" X 7/16" Overall Size: 22mm x 20Description: 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