<xs:simpleType name="ThreadSeriesEnumType">
  <xs:annotation>
    <xs:documentation>The ThreadSeriesEnumType enumerates values that describe a standard thread series. Thread series enumerations are designated in ASME B1.7-2006, Table 3 - Thread Series Designations and Table 4 - ISO Thread Series Designations. Note: Table 4 references ISO 228-1, ISO 7-1, ISO/R1501, ISO 2901, ISO 2902, ISO 2903, and ISO 2904.</xs:documentation>
  </xs:annotation>
  <xs:restriction base="xs:NMTOKEN">
    <xs:enumeration value="ACME"/>
    <xs:enumeration value="ACME_C"/>
    <xs:enumeration value="ACME_G"/>
    <xs:enumeration value="AMO"/>
    <xs:enumeration value="ANPT"/>
    <xs:enumeration value="BUTT"/>
    <xs:enumeration value="PUSH_BUTT"/>
    <xs:enumeration value="F_PTF"/>
    <xs:enumeration value="M"/>
    <xs:enumeration value="MJ"/>
    <xs:enumeration value="MJS"/>
    <xs:enumeration value="NC5_HF"/>
    <xs:enumeration value="NC5_CSF"/>
    <xs:enumeration value="NC5_ONF"/>
    <xs:enumeration value="NC5_IF"/>
    <xs:enumeration value="NC5_INF"/>
    <xs:enumeration value="NGO"/>
    <xs:enumeration value="NGS"/>
    <xs:enumeration value="NGT"/>
    <xs:enumeration value="NH"/>
    <xs:enumeration value="NHR"/>
    <xs:enumeration value="NPSC"/>
    <xs:enumeration value="NPSF"/>
    <xs:enumeration value="NPSH"/>
    <xs:enumeration value="NPSI"/>
    <xs:enumeration value="NPSL"/>
    <xs:enumeration value="NPSM"/>
    <xs:enumeration value="NPT"/>
    <xs:enumeration value="NPTF"/>
    <xs:enumeration value="PTF_SAE_SHORT"/>
    <xs:enumeration value="PTF_SPL_SHORT"/>
    <xs:enumeration value="PTF_SPL_EXTRA_SHORT"/>
    <xs:enumeration value="SGT"/>
    <xs:enumeration value="SPL_PTF"/>
    <xs:enumeration value="STUB_ACME"/>
    <xs:enumeration value="UN"/>
    <xs:enumeration value="UNC"/>
    <xs:enumeration value="UNF"/>
    <xs:enumeration value="UNEF"/>
    <xs:enumeration value="UNJ"/>
    <xs:enumeration value="UNJC"/>
    <xs:enumeration value="UNJF"/>
    <xs:enumeration value="UNJEF"/>
    <xs:enumeration value="UNR"/>
    <xs:enumeration value="UNRC"/>
    <xs:enumeration value="UNRF"/>
    <xs:enumeration value="UNREF"/>
    <xs:enumeration value="UNM"/>
    <xs:enumeration value="UNS"/>
    <xs:enumeration value="G"/>
    <xs:enumeration value="R"/>
    <xs:enumeration value="RC"/>
    <xs:enumeration value="RP"/>
    <xs:enumeration value="S"/>
    <xs:enumeration value="TR"/>
    <xs:enumeration value="UNDEFINED"/>
  </xs:restriction>
</xs:simpleType>