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ASME B1.12

Class 5 Interference-Fit Thread

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Organization: ASME
Publication Date: 1 January 1987
Status: active
Page Count: 74
scope:

This Standard provides dimensional tables for external and internal plastic flow interference-fit (Class 5) threads of modified National thread form in the coarse thread series (NC) in sizes 0.250 in. through 1.500 in. This is not the ANSI B1.1 UN thread form. It is intended that designs conforming with this Standard will provide adequate torque conditions which fall within the limits shown in Table 8. The minimum torques are intended to be sufficient to insure that externally threaded members will not loosen in service; the maximum torques establish a ceiling below which seizing, galling, or torsional failure of the externally threaded components is reduced. This Standard provides for the maximum allowable interference.

Appendices A, B, C, and D contain useful information that is supplementary to this Standard, such as reprints of the obsolete tentative and alternate Class 5 standards, U.S. Navy ship specifications for elastic interference- fit coarse thread series from 0.250 in. through 2.000 in., U.S. Navy ship specifications for Class 5 Modified which includes nickel-copper-aluminum alloy external threads, and an interference metal comparison of standard to nonstandard interference-fit threads.

Document History

ASME B1.12
January 1, 1987
Class 5 Interference-Fit Thread
This Standard provides dimensional tables for external and internal plastic flow interference-fit (Class 5) threads of modified National thread form in the coarse thread series (NC) in sizes 0.250...
January 1, 1987
Class 5 Interference-Fit Thread
This Standard provides dimensional tables for external and internal plastic flow interference-fit (Class 5) threads of modified National thread form in the coarse thread series (NC) in sizes 0.250...
January 1, 1987
Class 5 Interference-Fit Thread
This Standard provides dimensional tables for external and internal plastic flow interference-fit (Class 5) threads of modified National thread form in the coarse thread series (NC) in sizes 0.250...
January 1, 1972
CLASS 5 INTERFERENCE-FIT THREAD
A description is not available for this item.

References

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