Abstract of ASTM F959M

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 ASTM A325M bolts, and
1.2.2 Type 10.9 – Direct tension indicators for use with Specification ASTM A490M bolts.

1.3 Direct tension indicators are intended for installation under either a bolt head or a hardened washer. (See Appendix Xl ).

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