ASME B1.1-2003 PDF

Buy ASME B UNIFIED INCH SCREW THREADS, (UN AND UNR THREAD FORM) from SAI Global. ANSI/ASME B was revised in The revisions pose the risk of controversy over thread requirements and disputes over part acceptability. ASME B [Revision of ASME B (R)] Unified Inch Screw Threads (UN and UNR Thread Form) A N A M E R I C A N N AT I O N A L STA N DA.

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Nonmandatory Appendices A through E contain useful information that is supplementary to the sections of this Standard. Revision to some values in Table g1.1-2003 Begin an education process aimed at third-party government inspectors to train them to understand and work to the now current version of B1.

Two basic things in B1.

ANSI/ASME B Change Summary

Gage Crib Worldwide, Inc. I expect that paragraph 8. You can download and open this file to your own computer but DRM prevents b1.-2003 this file on another computer, including a networked server. By replacing all previous versions of the standard the N-series screw thread, defined in B1.

I personally will do everything I can to eliminate the confusion which can lead to controversy. It does not eliminate the UNS designation, but will eventually restrict their use to those willing to do the math to engineer the thread because as of the next revision of the standard the chart will disappear.


It has been over half a century and high quality ISO registered companies are still making screw threads to the long obsolete Asem. Please first verify your email before subscribing to alerts. There b1.-12003 several other changes in the standard, as would be expected.

The print requires the N-series and he does not dare b11.1-2003 from the drawing. B1.1-203 is something that all engineers need to address. Top Gage Crib Worldwide, Inc. This is a smart move to encourage standardization. Several variations in thread form have been developed for unified threads; however, this Standard covers only [Unified] UN and UNR [external threads only] thread forms. When the drawing indicates the N-series b1.12-003 thread, it is known that the thread is specified in B1.

For easy reference, a metric translation of this Standard has been incorporated as Nonmandatory Appendix C. Table 3B has been moved: I hope we are not we looking at another 60 years of controversy. To purchase a copy visit an Authorized Reseller.

If the document is revised or amended, you will be notified by email. What is the big controversy?

UNS Thread ASME B1.1-2003

If accuracy is critical, base your final decisions on the data provided in the root document: You may delete a document from your Alert Profile at any time. That does not seem like much. The seemingly random number changes hit many of the listed standard screw thread sizes. The first sentence in the Foreward is their strongest move to eliminate the N-series screw threads once and for all.


This statement could be used as authorization to deviate from a drawing. I explain to the requestor: This statement is strong because it has been printed in the now current standard.

The customer is always right. That was the time that the N-series was replaced with the UN-series. The N-series is fully mechanically interchangeable with the UN-series. It informs all who make 60 degree inch screw threads that all previous versions of the standard have been replaced.

Standards Subsctiption may be the perfect solution. To get the complete details, buy a copy and read the Foreward. Several times in the standard they remind the reader that the N-series is mechanically interchangeable with the UN-series. This is a seemingly innocuous statement, but this is where the pitch asmr change by 0. The difference is only 0.