Nuts & bolts

Nuts & bolts

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

Industry: Machine tools

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Nuts & bolts

proof load

Machine tools; Nuts & bolts

The proof load of a nut is the axially applied load the nut must withstand without thread stripping or rupture. The proof load of a bolt, screw or stud is the specified load the product must ...

metal to metal contact flange joint

A flanged joint in which a gasket is compressed by bolts - the gasket being located in a recess within the joint so that it is compressed by the bolt loads until metal to metal contact occurs. Unlike ...

black bolts and nuts

Machine tools; Nuts & bolts

The word black refers to the comparatively wider tolerances employed and not necessarily to the color of the surface finish of the fastener.

screw thread

Machine tools; Nuts & bolts

A ridge of constant section which is manufactured so that a helix is developed on the internal or external surface of a cylinder.

thread root

Machine tools; Nuts & bolts

The thread root is the bottom of the thread, on external threads the roots are usually rounded so that fatigue performance is improved.

dacromet

Machine tools; Nuts & bolts

A high performance surface coating that can be applied to fasteners. The coating consists of passivated zinc flakes that are stoved onto the metal surface. The coating can be colored and eliminates ...