Glossary “bolt thread pitch” Definition:
Measurement of the thread courseness.

Glossary “bolt torque” Definition:
The turning effort required to offset resistance as the bolt is being tightened.

Glossary “bolt on” Definition:
An aftermarket accessory that can be installed without modification.

Glossary “bolt strength” Definition:
Indicates the amount of torque or tightening force that should be applied.

Glossary “bolt stretch” Definition:
1). When a bolt is elongated and the shank and/or thread diameter is smaller than specification. 2). When a bolt is torqued as specified and, as a result, is stretched a predetermined amount.

Glossary “bolt hardness” Definition:
The hardness of a bolt is identified by the number of lines on the head of the bolt. The more lines, the stronger the bolt.

Glossary “bolt head” Definition:
Part of the bolt that is used to torque or tighten the bolt.

Glossary “bolt head size” Definition:
Distance measured across the flats of the bolt head.

Glossary “bolt length” Definition:
Measures the length of the bolt from the end of the threads to the bottom of the bolt head.

Glossary “bolt friction” Definition:
Bolt tension and friction use the energy from torque. Bolt tension uses up 10% of the energy and friction uses up 90% of the energy. Bolt friction take energy away from bolt tension.

Glossary “bolt grade” Definition:
The strength of a bolt.

Glossary “bolt circle diameter” Definition:
The diameter of an imaginary line running through the bolt hole center.