Nuts & bolts

Nuts & bolts

Engineering science related to nuts, bolts, threaded fasteners and tightening techniques.

Industry: Machine tools

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Nuts & bolts

breakloose torque

Machine tools; Nuts & bolts

The torque required to effect reverse rotation when a pre-stressed threaded assembly is loosened.

symmetrical thread

Machine tools; Nuts & bolts

A symmetrical thread is one which has both flanks of the thread profile inclined at the same angle.

The factor in the torque tightening equation: T=KDF where T is the fastener tightening torque in Newton meters, D is the fastener diameter in meters, F is the fasteners preload in Newtons and K is a ...

wire thread insert

Machine tools; Nuts & bolts

A threaded insert that is typically used for tapped hole repair or to improve the thread stripping strength of softer metals such as zinc and aluminum. The inserts are assembled into a previously ...

relaxation

Machine tools; Nuts & bolts

The loss of clamping force in a bolt that occurs typically without any nut rotation occurring. Commonly occurs as a result of embedment but can also be due to gasket creep, metal creep (at elevated ...

meanshift

Machine tools; Nuts & bolts

The difference in tightening torque values produced by the same tightening tool on hard and soft joints. A hard joint typically gives a higher torque value than a soft joint. Generally speaking, the ...