Science terminology

Glossary Terminology related to nuts and bolts Presented below is a glossary of terminology on topics related to nuts and bolts, threaded fasteners and tightening techniques.

Science terminology

Information on Screw Threads The pitch diameter often called the effective diameter of a parallel thread is the diameter Science terminology the imaginary co-axial cylinder which intersects the surface of the thread in such a manner that the intercept on a generator of the cylinder, between the points where it meets the opposite flanks of a thread groove, is equal to half the nominal pitch of the thread.

The major diameter of a thread is the diameter of the imaginary co-axial cylinder that just touches the crest of an external thread or the root of an internal thread. The minor diameter is the diameter of an imaginary cylinder that just touches the roots of an external thread and or the crests of an internal thread.

The crest of a thread is the prominent part of a thread, whether internal or external. The root is the bottom of the groove between the two flanking surfaces of the thread whether internal or external.

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The flanks of a thread are the straight sides that connect the crest and the root. The angle of a thread is the angle between the flanks, measured in an axial plane section.

The pitch of a thread is the distance, measured parallel to its axis, between corresponding points on adjacent surfaces, in the same axial plane.IUPAC Compendium of Chemical Terminology - the Gold Book. Welcome to the interactive version of IUPAC Compendium of Chemical Terminology, informally known as the Gold Book.

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Science terminology

1 Published by ASE Publications on behalf of ASE-Nuffield THE LANGUAGE OF MEASUREMENT Terminology used in school science investigations.

GLOSSARY OF SCIENTIFIC TERMS. Scientific Divisions | Animals | Elements | Ologies | Motion | Particles. absolute zero.

Revision of Glossary of Soil Science Terms

The lowest theoretical temperature (0K = °C) where all molecular activity ceases. acceleration. Rate of change of velocity. acid. A compound that yields hydrogen ions (H +) when in aqueous solution.

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Acids have a sour taste and turn blue litmus red. Environmental science is an interdisciplinary academic field that integrates physical, biological and information sciences (including ecology, biology, physics, chemistry, plant science, zoology, mineralogy, oceanography, limnology, soil science, geology and physical geography (), and atmospheric science) to the study of the environment, and the solution of environmental problems.

The pitch diameter (often called the effective diameter) of a parallel thread is the diameter of the imaginary co-axial cylinder which intersects the surface of the thread in such a manner that the intercept on a generator of the cylinder, between the points where it meets the opposite flanks of a thread groove, is equal to half the nominal pitch of the thread.

Bolt Science - Basic Terminology related to Screw Threads