ASTM F2031-05(2010) PDF

1.1 This test method covers the formulation and designation of arrow spine measurement standards and nomenclature for arrow shafts.

1.2 The English system of measurement, specifically inches of deflection, shall be used for all spine values expressed for a given arrow shaft.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.