蟹かに目め釘くぎ

noun

large half-dome-shaped nail

A nail with a large, rounded head resembling a crab's eye, used in construction and woodworking for decorative or functional purposes.

• この建たて具ぐには蟹かに目め釘くぎが使つかわれている。

  Crab-eye nails are used in this fitting.