50pcs #14 x 1" Self Drilling Screws Roofing Screws with EPDM Washer Beakers and Test Tubes Total Length: 59mm / 2

Total Length: 59mm / 2

tighten the screw at the proper position you need

Needle Diameter: 2mm / 0

Plate Size: 40 x 40 x 16mm / 1

50pcs #14 x 1" Self Drilling Screws Roofing Screws with EPDM Washer Beakers and Test Tubes Total Length: 59mm / 2Description: 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