12x1-1/2" Metal to Metal Type #5 (Galvanized/ZINC) Hex Head Drill Point Metal to Metal Roofing Screws. 9/16" EPDM Washer: Amazon.com: Industrial & Scientific
Stainless Steel Machine Screw, Flat Head, Hex End, 5/16-18, Type B Point - Hi-Tech Glazing Supplies
Pack OF 100) 5.5 x 51mm Tech Screws for roofing & cladding self drill tek screw | eBay
GRAPH-TECH inch saddle screws 4/40 (5/16) - Guitar Parts Center
Teks #12 x 1-1/2 in. External Hex Drive Washer Head Roofing Screws (300-Pack) 21422 - The Home Depot
Roof Tech Hardware | Greentech Renewables
3/8-16 x 1 Grade 5 Hex Head Cap Screws, 37C100HCS5Z | Tanner
The Purpose of Tek 4 or 5 Screw Points | All Points Fasteners
12 x 1-1/2'' Tek 5 Hex Washer Head Self Drilling Screw | LH Dottie
Tech 5 Pro-Point Screws – Conklin Metal Industries
Fastenal Industrial Supplies, OEM Fasteners, Safety Products & More