ASME B1.10M:2004 pdf free download.UNIFIED MINIATURE SCREW THREADS.
The minor diameter is then gaged with only one insertion of the plain cylindrical plug gage per thread, as the act of gaging can wear the thread oversize. At this point, the minor diameter is considered to be acceptable. The thread is gaged with only one insertion of the C0” thread plug gage The thread is accepted or zejected on the basis of this one insertion. Repeat insertions can wear out/dauiage the thread.
1.53 Refemnce Temperature. The reference temperature is 20°C for the dimensions defined by this system.
1.5.4 UnIts of Measure. All dimensions in this Standard, including aU tables, are in millimeters unless otherwise specified. Inch conversions may be found in Nonmandatory Appendices B, C, and 0.
1.5.5 Federal Government Use. When this Standard is approved by the Deparbent of Defense (DOD) and federal agencies, and is incorporated into FED-STDH28/5, Screw-Thread Standards for Federal Services, Section 5, the use of this Standard by federal government will be subject to all requirements and Limitations of FED-STD-H28/5.
2 SCREW ThREAD PROFILE
2.1 Scope
The basic profile and design profiles defined in this Section are the basis of all thread dimensions given in this Standard.
2.2 Bask Profile
The basic profile for the LJNM saew threads is shown in Fig. 1 (profile applies to the axial plane), and except for one element is the Unified Basic Thread Form. The exception is the height of thread engagement for which the basic value is O.4800P. The basic thread height of O4800P (O.554H) will not affect interthangeability with products made to the 1958 revision of this Standard showing O.5200P. As the resulting difference is negligible and completely offset by practical considerations in tapping, full internal thread heights are avoided in these small sizes to escape excessive tap breakage.
For reference, the basic profile for UNM screw threads is identical to that for ISO metric threads in I5O/R1501.
2.3 Design Profiles.
ASME B1.10M:2004 pdf free download
