‘o
10
CHANGE NOTICES ARE NOT CUMULATIVE
FED-STD-H28/20B
AND SHALL BE RETAINED UNTIL SUCH
CHANGE NOTICE I
TIME AS THE STANDARD IS REVISED
21 DECEMBER 1994
FEDERAL STANDARD
SCREW-THREAD STANDARDS FOR FEDERAL SERVICES
SECTION 20
INSPECTION METHODS FOR ACCEPTABILITY
OF UN, UNR, UNJ, M, AND MJ SCREW THREADS
The following changes, which form a part of FED-STD-H28/20B dated 10 March 1994,
are approved by the Commissioner, Federal Supply Service. General Services
Administration, for the use of all Federal agencies,
Page 4; Paragraph 5.1.3.2- Redesignate existing items ‘Cc”and “d” as “d” and “e”,
respectively, and add the following new item “c”:
“c. When size measurement values forejudging acceptance or rejection of product
thread pitch. major or minor diameters or root profiles are NOT required.’”
RETAIN THIS CHANGE NOTICE AND PLACE [T BEFORE THE FIRST PAGE OF THE
STANDARD
MILITARY INTERESTS:
Custo
dians:
Army - AR
Navy - AS
Air Force -99
&view Activik:
Army - AT. AV, ER. ME, MI
Navy - EC, OS, YD
Air Force -82
AMSC N/A
DISTRIBUTION STATEMENT A.
CIVIL AGENCY COORDINATING ACTIVITY:
GSA - 7FXE
PREPARING ACTIVITY:
DLA - IS
(DoD Project THDS-O 101)
AREA THDS
Approved for public release: distribution is unlimited.
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