Hex‑Head Bolt With Drilled Shank

A hex‑head bolt with drilled shank comprises a bolt body. The bolt body consists of a hex head and a shank and is integrally formed. One end of the bolt body is provided with the hex head, and a transition step is arranged at the joint between the hex head and the shank. A plurality of radial through‑holes are formed on the side wall of the shank end away from the hex head, and external threads are machined on the shank end where the radial through‑holes are located.

A fillet is arranged on the transition step at the joint between the hex head and the shank, and a chamfer is provided at the threaded end of the shank.

Beneficial effects of the utility model: The product can fasten and fix components with high fastening reliability. The radial through‑holes at the end of the shank can cooperate with split pins for anti‑loosening locking. It is mainly applied to locomotives, trains and other vibration‑prone working conditions, effectively preventing the bolt from loosening under vibration and featuring long service life.

1,A hex‑head bolt with drilled shank, comprising a bolt body, characterized in that the bolt body includes a hex head and a shank; the bolt body is of an integral structure. One end of the bolt body is provided with the hex head, a transition step is arranged at the joint between the hex head and the shank; a plurality of radial through‑holes are arranged on the side wall of the shank end away from the hex head, and external threads are machined on the shank end where the radial through‑holes are arranged.

2,The hex‑head bolt with drilled shank according to Claim 1, characterized in that a fillet is arranged on the transition step at the joint between the hex head and the shank, and a chamfer is arranged at the threaded end of the shank.

3,The hex‑head bolt with drilled shank according to Claim 1 or Claim 2, characterized in that the across‑corners dimension of the hex head is 32‑35 mm, the across‑flats dimension of the hex head is 27‑30 mm, the length of the shank is 275‑285 mm, and the aperture of each radial through‑hole is 1.5‑2.5 mm.