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NPFC - FED-STD-H28/21

SCREW-THREAD STANDARDS FOR FEDERAL SERVICES SECTION 21 METRIC SCREW-THREADS

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Organization: NPFC
Publication Date: 8 February 1995
Status: active
Page Count: 1

Document History

FED-STD-H28/21B VALID NOTICE 6
January 23, 2024
Screw-Thread Standards for Federal Services Section 21 Metric Screw-Threads
A description is not available for this item.
FED-STD-H28/21
February 28, 2019
Screw-Thread Standards for Federal Services Section 21 Metric Screw-Threads
A description is not available for this item.
FED-STD-H28/21
August 29, 2006
SCREW-THREAD STANDARDS FOR FEDERAL SERVICES SECTION 21 METRIC SCREW-THREADS
A description is not available for this item.
FED-STD-H28/21
September 10, 2001
SCREW-THREAD STANDARDS FOR FEDERAL SERVICES SECTION 21 METRIC SCREW-THREADS
A description is not available for this item.
FED-STD-H28/21
February 8, 1995
SCREW-THREAD STANDARDS FOR FEDERAL SERVICES SECTION 21 METRIC SCREW-THREADS
A description is not available for this item.
FED-STD-H28/21
November 22, 1989
SCREW-THREAD STANDARDS FOR FEDERAL SERVICES SECTION 21 METRIC SCREW-THREADS
A description is not available for this item.
FED-STD-H28/21
November 28, 1984
SCREW-THREAD STANDARDS FOR FEDERAL SERVICES SECTION 21 METRIC SCREW-THREADS
The metric screw thread standards described herein constitute the basic standards to be used by the Federal Services. This document contains general standards for 60°, symmetrical threads - the M...
FED-STD-H28/21
December 29, 1980
SCREW-THREAD STANDARDS FOR FEDERAL SERVICES SECTION 21 METRIC SCREW-THREADS
A description is not available for this item.
FED-STD-00H28/21
May 31, 1977
SCREW-THREAD STANDARDS FOR FEDERAL SERVICES SECTION 21 METRIC SCREW-THREADS
A description is not available for this item.
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References

This document references:
ASME B1.13M - Metric Screw Threads: M Profile
Published by ASME on January 1, 2005
This Standard contains general metric standards for a 60 deg symmetrical screw thread with a basic ISO 68-1 profile designated M profile. The M profile threads of tolerance class 6H/6g are intended...
This document references:
FED-STD-H28/1 - SCREW-THREAD STANDARDS FOR FEDERAL SERVICES SECTION 1 NOMENCLATURE, DEFINITIONS AND LETTER SYMBOLS FOR SCREW THREADS
Published by NPFC on April 21, 2020
This section establishes uniform practices with regard to screw thread nomenclature and letter symbols for designating characteristics of screw threads. These are for use on drawings, in tables of...
This document references:
FED-STD-H28/20 - Screw-Thread Standards for Federal Services Section 20 Inspection Methods for Acceptability of UN, UNR, UNJ, M, AND MJ Screw Threads
Published by NPFC on September 10, 2019
A description is not available for this item.
This document references:
FED-STD-H28/22 - SCREW-THREAD STANDARDS FOR FEDERAL SERVICES SECTION 22 GAGES AND GAGING FOR METRIC SCREW THREADS-M AND MJ THREAD FORMS
Published by NPFC on November 5, 1987
This section provides the standards for basic gaging principles, gaging practice, gage specifications, gage dimensions, gage measurements, measuring equipment, and calibration requirements for metric...
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