Single thread for a tight grip. Drywall Screws Wafer Head Standard Point BZP CE - 4.2 x 14. M6 Through Bolts Heavy Duty Masonry Anchor BZP ETA Approved. Wafer Head, Drywall Screw Applications. M5 Hex Bolt Nut Washer A2 304 Stainless Steel Under 70mm.
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