Which ASTM standard applies to compressible washer-type direct tension indicators?

The ASTM standard that applies to compressible washer-type direct tension indicators is F959. This standard specifically addresses the requirements for these indicators, which are designed to provide a measurable indication of bolt tension. Direct tension indicators are used to ensure that a bolt has been tightened to its required tension, which is critical for the integrity and performance of bolted joints in structure applications.

Understanding the significance of F959 involves recognizing that it covers not only the material properties of the washers but also their performance criteria in relation to the tensioning of bolts. This contributes to achieving the desired joint behavior under load, making the correct application of this standard essential for engineers and construction professionals.

The other ASTM standards listed refer to different types of products or specifications that do not relate directly to compressible washers or direct tension indicators. F708 is related to the specification for steel bolting materials for structural steel and F844 specifies the requirements for washers used with structural bolts. F1554 pertains to anchor bolts. Each of these standards has its specific context and application that is distinct from the functions and requirements set forth in F959.