#4 Point - Hex Washer - Unslotted - with EPDM Washer - Self Drilling Screws - Steel - Silver Ruspert
Screw is Case Hardened to Rockwell C50-56
(Core Hardness: Rockwell C32-40)
High Corrosion Resistance
Used in metal roofing to create a leak-proof seal
#4 Point - Steel Zinc / 1,000 Hour Salt Spray Rated
Technical Specifications / 2D 
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