Silicon bronze wood screw
Silicon bronze fasteners are primarily used for marine boatbuilding, although many people appreciate the look they can provide with Western Red Cedar or Redwood because the screws will eventually blend into the color of the wood. Silicon bronze screws provide excellent corrosion resistance but are soft and require a carefully sized pilot hole to avoid breakage.

Composition:

CU:96.0-97.0  SI: 0.8-2.0    MN: <0.7  FE:<0.3  REMAINS: <0.1

Head: Flat head, round head, pan head, oval head, truss head, hex cap

Drive: Slotted, Phillips, square drive, Allen Key, Hex Cap

Length: 4mm -150mm

Diameter: 1.5mm -19.5mm

Standard: ANSI,DIN,BSW, JIS, ISO,GB,NON-STANDARD FASTENERS