Multi-piece bolts and methods of making the same

A bolt comprising:

• a threaded shaft having a first end, a second opposing end, and an external thread, the first end including a flared protrusion, the external thread being wrapped about the shaft and extending from the second opposing end to the flared protrusion;
• and
• a bolt head including (i) an interior threaded bore for threadingly engaging the external thread of the threaded shaft, (ii) a front surface, and (iii) an opposing back surface having a recess configured to receive at least a portion of the flared protrusion of the threaded shaft therein,
• wherein the bolt is configured to be installed in conjunction with a nut that threadingly engages the threaded shaft of the bolt, thereby resulting in preload forces, and wherein the bolt head aids in distributing torsional forces during installation of the bolt with the nut towards the opposing back surface of the bolt head.

A bolt comprising:

• a threaded shaft having a first end, a second opposing end, and an external thread, the first end including a flared protrusion, the external thread being wrapped about the shaft and extending from the second opposing end to the flared protrusion;
• and
• a bolt head including (i) an interior threaded bore for threadingly engaging the external thread of the threaded shaft, (ii) a front surface, and (iii) an opposing back surface having a recess configured to receive at least a portion of the flared protrusion of the threaded shaft therein,
• wherein the bolt is configured to be installed in conjunction with a nut that threadingly engages the threaded shaft of the bolt, thereby resulting in preload forces, and wherein engagement between the interior threaded bore and the external thread of the threaded shaft aids in distributing clamp load forces subsequent to installation of the bolt with the nut along an axial length of the threaded shaft.

A bolt comprising:

• a threaded shaft having a first end, a second opposing end, an external thread, and a flared protrusion, the external thread being wrapped about the shaft and extending from the second opposing end to the flared protrusion;
• and
• a bolt head including:
• a main body including (i) an interior threaded bore, (ii) a front surface having a first recess, and (iii) an opposing back surface having a second recess configured to receive at least a portion of the flared end of the threaded shaft therein, and
• a deformable body including an interior threaded bore and an outer flange, the outer flange being coupled to the front surface of the main body such that a relief space is formed between the deformable body and the first recess of the main body.