#4 x 1/2" Slotted Flat Head Wood Screws Silicon Bronze

#4 x 1/2" slotted flat head wood screws in silicon bronze, ASME B18.6.1: an 82° countersunk flat head that sits flush with the surface, traditional straight-slot drive, and a coarse partial (2/3) thread with gimlet point. Silicon bronze resists saltwater corrosion, is non-magnetic and will not rust, which makes it the traditional choice for boatbuilding, docks and marine hardware, and for exterior wood and architectural work where it weathers to a natural patina. Sold in production-volume bulk packs.