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MIL-STD-407.014721.PDF
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MIL-STD-407.014721.PDF
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NOTE: MIL-STD-407 has been redesignated as a Test Method Standard. The cover
page has been changed for Administrative reasons. There are no other changes
to this Document.
MIL-STD-407
15 FEBRUARY 1957
SUPERSEDING
NAVSHIPS 250-344-7
JANUARY 1955
AMSC N/A FSC 93GP
DISTRIBUTION STATEMENT A. Approved for public release; distribution is
unlimited.
DEPARTMENT OF DEFENSE
TEST METHOD
VISUAL INSPECTION GUIDE
FOR
RUBBER MOLDED ITEMS
Downloaded from http://www.everyspec.com
MIL-STD-407
15 February 1957
OFFICE OF THE ASSISTANT SECRETARY OF DEFENSE,
WASHINGTON 25, D. C.
15 FEBRUARY 1957.
Supply and Logistics
VISUAL INSPECTION GUIDE FOR RUBBER MOLDED ITE.MS
MIL-STD-407
1. This standard has been approved by the Department of Defense and
is mandatory for use by the Departments of the Army, the Navy, and the
Air Force, effective immediately.
2. In accordance with established procedure, the Standardization Division
has designated the Ordnance Corps, the Bureau of Ships, and the Air Force,
respectively, as Army–Navy-Air Force custodians of this standard.
3. Recommended corrections, additions, or deletions should be addressed
to the Standardization Division, Office of the Assistant Secretary of Defense
(Supply and Logistics), Washington 25, D. C.
ii
Downloaded from http://www.everyspec.com
MIL-STD-407
15 February 1957
FOREWORD
Government material procurement specifications have been primarily con-
cerned with detailing composition, construction and necessary physical re-
quirements.
However, little attention has been paid to defining the limits of
acceptable quality regarding manufacturing defects other than such general-
izations as “the workmanship shall be first class”.
In such a diverse industry
as that of rubber manufacturing, individual plants vary considerably in their
production and quality control techniques. Defects are likely to occur
from many causes such as variation in the quality of the basic materials
and variations in manufacturing processes and finishing operations. Therefore,
the quality generalizations used in this document must of necessity cover a
considerable range which represents the best available judgment. This docu-
ment is issued as a practical yardstick which Inspectors w-ill use to appraise
visually the quality of rubber molded items.
iii
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MIL-STD-407
15 February 1957
CONTENTS
1.
SCOPE AND PURPOSE ---------------------------------------------------------------
1.1
SCOPE -----------------------------------------------------------------------------------------
1.2
PURPOSE ------------------------------------------------------------------------------------
2.
REFERENCED DOCUMENTS --------------------------------------------------------
2.1
STANDARDS --------------------------------------------------------------------------------
3.
DEFINITIONS -------------------------------------------------------------------------------
4.
DEFECT DESCRIPTIONS AND CLASSIFICATION -------------------------
TABLES
1
1
1
1
1
1
1
Table I—Defects Classification
iv
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1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
LIST OF FIGURES
Air check—location I—major; location
II—minor.
Air checks—location
I—major; loca-
tion II—major.
Trapped air—location I—major; loca-
tion II—major,
Trapped air—location I—major; loca-
tion II—major,
Trapped air
—location I—major; loca-
tion II—minor.
Trapped air—location I—major; loca-
tion II—minor,
Blister—location I—major; location II—
major.
Blister—1ocation I—major; location II—
major.
Blister—1ocation I—major; location II—
major.
Blister—1ocation I—major; location II—
minor.
Blister—1ocation I—major; location II—
minor.
Blister—1ocation I—major; location II—
minor.
Bloom, heavy
—location I—major; loca-
tion II—minor.
Bloom, heavy-location I—major; loca-
tion II—minor.
Cavity, damaged—location I—major; lo-
cation II—minor.
Cavity, damaged-location I—major; lo-
cation II—minor.
Cavity, damaged—location I—major; lo-
cation II—minor.
Cavity, damaged—location I—major; lo-
cation II—minor.
Cavity, damaged—location I—major; lo-
cation II—minor.
Cavity, damaged—location I—major; lo-
cation-minor.
Cavity, small mold scratch—location I—
not a defect; location II—not a defect.
Coating, defective—
location I—major;
location II—major.
23.
24.
25.
26.
27.
28.
29.
30.
31.
32.
33.
34.
35.
36.
37.
38.
39.
40.
41.
42.
43.
MIL-STD-407
15 February 1957
Coating, defective—location I—major;
location II—major.
Coating, defective-location I—major;
location II—major,
Crack—location I—major; location II—
major,
Crack—1ocation I—major; location II—
major,
Crack—1ocation I—major; location II—
major.
Crack—1ocation I—major; location II—
minor, .
Deformed—location I—major; location
II—major. (Upper example is a de-
fective.
Lower example is a correct
one for comparison. )
Deformed—location I—major; location
II—minor.
Deformed—location I—major; location
II—minor,
Deformed—location I—major; location
II—minor.
Bad fill—location I—major; location II—
major.
Bad fill—location I—major; location II—
major.
Bad fill-location I—major; location II—
major.
Poor fill-location I—major; location
II—minor.
Flash,
tion
Flash,
tion
Flow
tion
Flow
tion
F1ow
tion
Flow
tion
cured-in—location I—major; loca-
II—major.
cured-in—location I—major; loca-
II—minor.
mark—location I—major; loca-
II—minor.
mark—location
I—major: loca-
II—minor.
mark—location I—major; loca-
II—minor.
mark—location
I—major; loca-
II—minor.
Foreign material—location I—major; lo-
cation II—major.
v
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