(2500) 14 x 7/8 Self Drilling TEK Hex Head Neo Washer Roof Screw #137791. Unslotted Indented Hex Washer Head, Zinc Plated w/Bonded NEO-EPDM Washer. The item "(2500) 14 x 7/8 Self Drilling TEK Hex Head Neo Washer Roof Screw #137791" is in sale since Thursday, August 10, 2017.This item is in the category "Business & Industrial\Fasteners & Hardware\Screws & Bolts". The seller is "shinersusa" and is located in Grand Prairie, Texas. This item can be shipped to United States.