Fed. Std. No. 346C
,..p~ilZS, 1976
SUPERSEDING
Fed. Std. No. 3469
March 12, 1974
FEDERAL STANDARO
GAGES , WRENCH OPENING
This standard was approved by the Commissioner, Federal
Supply Service, General Services Administration, for the
use of all Federal agencies.
S1. PURPOSE AND SCOPE
This Federal standard establishes the sizes for gages
procured by the Federal Government. The gages do not
but only those most commonly procured.
S2. APPL1CATION
for wrench ‘openiqs in items
cover every available size,
The gages covered by this *tandard shall be “secf to insure receipt of conforming
products in inch and metric sizes.
S3 .
REQU lREMENT
The gages shall be similar to , and with dimensions as show” i“ figure 1, ,except for
nominal sizes of 3 inches or 75mm and greater where the D and E dimensions need only
be equal to or greater than the required minimum depth of opening for the product
o
being measured.
The gages shall be of the sizes and tolerances shown in tables I and II.
“GO,, GAGE
“NO GO” GAGE
FIGURE 1.
I
B = Nominal size x 1.1550
+.0002
Tolerance = _.OOOo
Shall be typical or diameter
D = A minimum dimension equal ‘co the nominal size.
E = A minimum dimension equal to 1/2 “cnninal size.
F = Nominal size x 1.1550
0
+.0002
Tolerance = _.~ooo
Shall be typical or diameter
FSC 5220
Downloaded from http://www.everyspec.com
