MIL-DTL-45912B
4.3 Examination. The sample bolts of 4.2.2 shall be examined as specified in Table IV. Any
bolt which contains one or more defects shall be a defective.
TABLE IV. Classification of Defects.
Inspection
Categories
Defects
Method
Critical
None
Major
101
Threads (3.5)
*SIE
102
Width across flats (3.2)
SIE
103
Undercut depth of head (3.2)
SIE
104
Slot and recess radius of head (3.2)
SIE
105
Bearing surface of head (3.6.2)
SIE
Minor
201
Overall length (3.2)
SIE
202
Thread length (3.2)
SIE
203
Head height (3.2)
SIE
204
Body diameter (3.2)
SIE
205
Head taper (3.6.1)
SIE
206
Other dimensions (3.2)
SIE
207
Protective finish (3.3)
Visual
*SIE = Standard Inspection Equipment
4.4 Tests.
4.4.1 Material. The contractor shall furnish certification that the material complies with the
requirements specified in 3.1.
4.4.2 Protective finish. The contractor shall furnish certification that the protective finish
conforms to the requirements of the specifications referenced in 3.3. When required by the
procuring agency, the sample bolts shall be tested as specified in the protective finish
specifications.
4.4.3 Proof load and tensile strength. The contractor shall furnish certification that the tensile
strength and proof load bolts conform to the requirements specified in 3.4. When required by the
procuring agency, the sample bolts specified in Table II shall be tested for hardness (see Table I).
The Rockwell hardness shall be measured at mid-radius on a transverse section taken one
diameter from the point of the bolt.
4.4.4 Hardness. The contractor shall furnish certification that the hardness conforms to the
requirements specified in Table I. When required by the procuring agency, the sample bolts
specified in Table II shall be tested for hardness (see Table I). The Rockwell hardness shall be
measured at mid-radius on a transverse section taken one diameter from the point of the bolt.
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