NPFC - FED-STD-H28/14
SCREW-THREAD STANDARDS FOR FEDERAL SERVICES SECTION 14 BUTTRESS SCREW THREADS - 7 DEG./45 DEG. FLANK ANGLES
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| Organization: | NPFC |
| Publication Date: | 9 June 1983 |
| Status: | active |
| Page Count: | 7 |
scope:
This section provides the standards for Buttress type screw threads, their gages and acceptability requirements. Buttress threads feature load flanks nearly perpendicular to the thread axis. This minimizes the radial component of a single direction axial force applied to the load flanks.
Threads covered in this section are limited to those with load flank angles of 7° and clearance flank angles of 45°.
The following thread forms are included in this section:
American National Standard Form - Engagement height 0.6 × pitch British Standard Form - Engagement height 0.4 × pitch
Document History
October 20, 2023
Screw-Thread Standards for Federal Services Section 14 Buttress Screw Threads-7 Deg./45 Deg. Flank Angles
A description is not available for this item.
February 28, 2019
Screw-Thread Standards for Federal Services Section 14 Buttress Screw Threads-7 Deg./45 Deg. Flank Angles
A description is not available for this item.
August 29, 2006
SCREW-THREAD STANDARDS FOR FEDERAL SERVICES SECTION 14 BUTTRESS SCREW THREADS - 7 DEG./45 DEG. FLANK ANGLES
A description is not available for this item.
September 10, 2001
SCREW-THREAD STANDARDS FOR FEDERAL SERVICES SECTION 14 BUTTRESS SCREW THREADS - 7 DEG./45 DEG. FLANK ANGLES
A description is not available for this item.
August 10, 1993
SCREW-THREAD STANDARDS FOR FEDERAL SERVICES SECTION 14 BUTTRESS SCREW THREADS - 7 DEG./45 DEG. FLANK ANGLES
A description is not available for this item.
February 5, 1988
SCREW-THREAD STANDARDS FOR FEDERAL SERVICES SECTION 14 BUTTRESS SCREW THREADS - 7 DEG./45 DEG. FLANK ANGLES
A description is not available for this item.
FED-STD-H28/14
June 9, 1983
SCREW-THREAD STANDARDS FOR FEDERAL SERVICES SECTION 14 BUTTRESS SCREW THREADS - 7 DEG./45 DEG. FLANK ANGLES
This section provides the standards for Buttress type screw threads, their gages and acceptability requirements. Buttress threads feature load flanks nearly perpendicular to the thread axis. This...
August 31, 1978
SCREW-THREAD STANDARDS FOR FEDERAL SERVICES SECTION 14 BUTTRESS SCREW THREADS - 7 DEG./45 DEG. FLANK ANGLES
A description is not available for this item.