V.. Glossary of Fastener and Fixing Terminology
vargal-nut, vickers-hardness-test, virtual-effective-diameter
GLOSSARY ALPHA LOCATOR
Spring contained all metal locking nut used in the Railway industry Product
VICKERS HARDNESS TEST
The Vickers test is often easier to use than other hardness tests since the required calculations are independent of the size of the indenter, and the indenter can be used for all materials irrespective of hardness. The basic principle, as with all common measures of hardness, is to observe the questioned material's ability to resist deformation.
VIRTUAL EFFECTIVE DIAMETER
The effective diameter of a thread but allowing for errors in pitch and flank angles.