ASTM F959M

Standard Specification for Compressible-Washer-Type Direct Tension Indicators for Use With Structural Fasteners [Metric]

English 1997
0.000
ASTM
Detailed Information

1.1 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.
1.2 Two types of direct tension indicators in nominal diameter sizes M16 through M36 are covered:
1.2.1 Type 8.8-Direct tension indicators for use with Specification A 325M bolts, and
1.2.2 Type 10.9-0irccI tension indicators for use with Specification A 490M bolts.
1.3 Direct tension indicators are intended for installation under either a bolt head or a hardened washer. (See Appendix X1.)

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