Patent ID: 8177668

Claim:
A dart comprising, in order from the front thereof, a tip, a barrel, a shaft, and a flight, wherein a hollow cylindrical cap-like portion for attachment to the rear of the shaft is formed at the front of the flight, the flight including a plurality of integral fins being capable of being connected in endwise fashion to the shaft in a single motion by a sliding engagement method; a groove is formed in a circumferential direction in one of the rear of the shaft or a hole in the hollow cylindrical cap-like portion, and at least one projection is formed on the other; the at least one projection engages with the groove when the shaft and the flight are mutually connected; the at least one projection has a first radius of curvature on a side thereof which contacts the groove as the shaft and the flight are being mutually connected, and a second radius of curvature on a side thereof which contacts the groove as the shaft and the flight are being mutually disconnected; and the first radius of curvature is substantially larger than the second radius of curvature.