ASTM F 959M - 06 Standard Specification for Compressible-Washer-Type Direct Tension Indicators for Use With Structural Fasteners [Metric]

American Society for Testing and Materials (ASTM). Current edition approved Nov. 1, 2006. Published November 2006. Originally approved in 1994. Last previous edition approved in 2004 as F 959M – 04. 5 p. This specification covers the requirements for compressible-washer-type direct tension indicators capable of indicating the achievement of a specified minimum bolt tension in a structural bolt.
Two types of direct tension indicators in nominal diameter sizes M16 through M36.