10X3/4 Slotted - Hex Washer - Self Piercing Screws w/ Bonded Neo-EPDM Washer
5/16" Across Flats
Creates leak-proof seal when attaching light-gauge steel
or aluminum to wood
Case Hardened to Rockwell C45 min (Core Hardness: Rockwell C28-38)
Fully Threaded / Steel Zinc Plated
