- Both defined by the Unified Thread Standard (UTS), see more info on this wikipedia page<\/a><\/li>
- UTS standard: ASME\/ANSI B1.1 \u2013 2019<\/li><\/ul><\/li>
- Metric<\/strong>
- Defined as per ISO 261 and 262<\/li>
- More info about Metric threads on this wikipedia page<\/a><\/li>
- Tolerances as per ISO 965 ( see tables here<\/a> )<\/li><\/ul><\/li>
- NPT<\/strong>
- NPT (National Pipe thread) standard: ANSI\/ASME B1.20.1<\/li>
- More info and tables on the wikipedia page<\/a><\/li><\/ul><\/li><\/ul>\n\n\n\n
Additional points to consider:<\/strong><\/p>\n\n\n\n
- We tolerate other types of threads such as NPS, NPTS, STI, BSP, although not all our suppliers will accept them, therefore your order may take longer to be sourced.<\/li>
- We do not accept ACME or Thorlabs<\/strong> threads.<\/li><\/ul>\n\n\n\n
Threads need to be called out in the “edit part” modal of your draft quote. It takes precedence over information present in the technical drawing and cannot contradict it. If threads are needed, you will need to attach a technical drawing with more details.<\/p>\n\n\n\n
Thread tolerances<\/h3>\n\n\n\n
Unless specified on the drawing, metric threads tolerances should follow the ISO 965-1 standard. The standard thread tolerances are used for external and internal threads: 6H for internal threads and 6g for external threads.<\/p>\n\n\n\n
The absence of tolerance class designation means that tolerance quality \u201cmedium\u201d with the following tolerance classes will be used:<\/p>\n\n\n\n
Internal threads<\/h3>\n\n\n\n
![\"\"](\"https:\/\/nb-hexing.com\/wp-content\/uploads\/2022\/09\/Screenshot_2021-03-01_at_11.22.43-2.jpeg\")
5H for threads up to and including M1,4
6H for threads M1,6 and larger<\/figcaption><\/figure>\n\n\n\n![\"\"](\"https:\/\/nb-hexing.com\/wp-content\/uploads\/2022\/09\/Screenshot_2021-03-01_at_10.53.11-1024x214.jpeg\")
Tolerance classes for internal threads<\/figcaption><\/figure>\n\n\n\n External threads<\/h3>\n\n\n\n
![\"\"](\"https:\/\/nb-hexing.com\/wp-content\/uploads\/2022\/09\/Screenshot_2021-03-01_at_11.03.41.jpeg\")
<\/figure>\n\n\n\n- 6h for threads up to and including M1,4<\/li>
- 6g for threads M1,6 and larger<\/li><\/ul>\n\n\n\n
![\"\"](\"https:\/\/nb-hexing.com\/wp-content\/uploads\/2022\/09\/002-1024x175.jpeg\")
Tolerance classes for external threads<\/figcaption><\/figure>\n\n\n\n <\/p>\n\n\n\n
UN Threads Tolerances:<\/strong><\/p>\n\n\n\n
Unless specified on the drawing, UN threads tolerances should follow the ASME B1.1-2003 standard. The standard thread tolerances are used as for external and internal threads: 2A for external threads and 2B for internal threads.<\/p>\n\n\n\n
Tolerances<\/h2>\n\n\n\n
Linear, angular dimensions and geometrical tolerances<\/h3>\n\n\n\n
We have two categories of tolerances: “GENERAL TOLERANCE”<\/strong> and “TIGHTER TOLERANCES”<\/strong>.<\/p>\n\n\n\n
- “ General tolerance<\/strong>” is the tolerance across the part if nothing is indicated on a technical drawing.
- For metals, the standard is ISO-2768 fH (fine) <\/strong>(see table below)<\/li>
- For plastics, the standard is ISO-2768 mK (medium) <\/strong>(see table below)<\/li><\/ul><\/li>
- “ Tighter tolerances<\/strong>“: if tolerances tighter than ISO-2768<\/strong> are needed, it can be requested when building a quote. It also needs to be specified in a technical drawing in order to indicate exactly which features are concerned.<\/li><\/ul>\n\n\n\n
You will be asked about tolerances when building your quote: tolerances are selected in the ‘edit part’ modal of your draft quote. It takes precedence over information present in the technical drawing and cannot contradict it.<\/p>\n\n\n\n
![\"\"](\"https:\/\/nb-hexing.com\/wp-content\/uploads\/2022\/09\/003-854x1024.jpeg\")
<\/figure>\n","protected":false},"excerpt":{"rendered":"Types and notation We offer four types of standard threads UNC and UNF Both defined by the Unified Thread Standard (UTS), see more info on this wikipedia page UTS standard: ASME\/ANSI B1.1 \u2013 2019 Metric Defined as per ISO 261 and 262 More info about Metric threads on this wikipedia page Tolerances as per ISO 965 ( see […]<\/p>\n","protected":false},"author":1,"featured_media":769,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"blocksy_meta":{"styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[],"version":6}},"featured_image_urls":{"full":["https:\/\/nb-hexing.com\/wp-content\/uploads\/2022\/09\/Threadchecker-Fig6.jpeg",576,507,false],"thumbnail":["https:\/\/nb-hexing.com\/wp-content\/uploads\/2022\/09\/Threadchecker-Fig6-150x150.jpeg",150,150,true],"medium":["https:\/\/nb-hexing.com\/wp-content\/uploads\/2022\/09\/Threadchecker-Fig6-300x264.jpeg",300,264,true],"medium_large":["https:\/\/nb-hexing.com\/wp-content\/uploads\/2022\/09\/Threadchecker-Fig6.jpeg",576,507,false],"large":["https:\/\/nb-hexing.com\/wp-content\/uploads\/2022\/09\/Threadchecker-Fig6.jpeg",576,507,false],"1536x1536":["https:\/\/nb-hexing.com\/wp-content\/uploads\/2022\/09\/Threadchecker-Fig6.jpeg",576,507,false],"2048x2048":["https:\/\/nb-hexing.com\/wp-content\/uploads\/2022\/09\/Threadchecker-Fig6.jpeg",576,507,false],"woocommerce_archive_thumbnail":["https:\/\/nb-hexing.com\/wp-content\/uploads\/2022\/09\/Threadchecker-Fig6-300x264.jpeg",300,264,true],"woocommerce_thumbnail":["https:\/\/nb-hexing.com\/wp-content\/uploads\/2022\/09\/Threadchecker-Fig6-300x264.jpeg",300,264,true],"woocommerce_single":["https:\/\/nb-hexing.com\/wp-content\/uploads\/2022\/09\/Threadchecker-Fig6.jpeg",576,507,false],"woocommerce_gallery_thumbnail":["https:\/\/nb-hexing.com\/wp-content\/uploads\/2022\/09\/Threadchecker-Fig6-100x100.jpeg",100,100,true]},"post_excerpt_stackable":"
Types and notation We offer four types of standard threads UNC and UNFBoth defined by the Unified Thread Standard (UTS), see more info on this wikipedia pageUTS standard: ASME\/ANSI B1.1 \u2013 2019MetricDefined as per ISO 261 and 262More info about Metric threads on this wikipedia pageTolerances as per ISO 965 ( see tables here )NPTNPT (National Pipe thread) standard: ANSI\/ASME B1.20.1More info and tables on the wikipedia page Additional points to consider: We tolerate other types of threads such as NPS, NPTS, STI, BSP, although not all our suppliers will accept them, therefore your order may take longer to be sourced.We do not accept ACME or…<\/p>\n","category_list":"Uncategorized<\/a>","author_info":{"name":"bowen","url":"https:\/\/nb-hexing.com\/?author=1"},"comments_num":"0 comments","_links":{"self":[{"href":"https:\/\/nb-hexing.com\/index.php?rest_route=\/wp\/v2\/posts\/764"}],"collection":[{"href":"https:\/\/nb-hexing.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nb-hexing.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nb-hexing.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nb-hexing.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=764"}],"version-history":[{"count":4,"href":"https:\/\/nb-hexing.com\/index.php?rest_route=\/wp\/v2\/posts\/764\/revisions"}],"predecessor-version":[{"id":776,"href":"https:\/\/nb-hexing.com\/index.php?rest_route=\/wp\/v2\/posts\/764\/revisions\/776"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nb-hexing.com\/index.php?rest_route=\/wp\/v2\/media\/769"}],"wp:attachment":[{"href":"https:\/\/nb-hexing.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=764"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nb-hexing.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=764"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nb-hexing.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=764"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
- For plastics, the standard is ISO-2768 mK (medium) <\/strong>(see table below)<\/li><\/ul><\/li>
- For metals, the standard is ISO-2768 fH (fine) <\/strong>(see table below)<\/li>
- “ General tolerance<\/strong>” is the tolerance across the part if nothing is indicated on a technical drawing.
- Tolerances as per ISO 965 ( see tables here<\/a> )<\/li><\/ul><\/li>