ASME B18-21.3 pdf download Double Coil Helical Spring Lock Washers for Wood Structures 1 INTRODUCTORY NOTES 11 Scope This Standard covers the dimensional and physicalproperties and methods of testing for double coil helicalspring lock washers for wood structures. NOTE: The word lock appearing in the name of the product inthis Standard is a generic term historically associated with theproduct’s identification...