MIL-DTL-27235B
4.2.2 Sampling.
4.2.2.1 Sampling for examination. A random sample of pins shall be selected from each lot
in accordance with Inspection Level II of ASQ Z1.4.
4.2.2.2 Sampling for tests. A random sample of pins shall be selected from each lot in
accordance with Level S-1 of ASQ Z1.4.
4.2.2.3 Sampling for passivation test. Sampling for passivation test shall be in accordance
with SAE AMS2700.
4.3 Examination.
4.3.1 Visual and dimensional. Each pin taken as specified in 4.2.2.1 shall be examined to
determine conformance with this specification. Examination shall be conducted in accordance
with Table I. Any pin in the sample containing one or more defects shall be rejected, and if the
number of defective pins in any sample exceeds the acceptance number for that sample, the lot
represented by the sample shall be rejected.
TABLE I. Classification of Defects.
Inspection
Categories
Defects
Method
Major
101
Pin diameter (3.5)
SIE*
102
Under head to centerline of drilled hole (length) (3.5)
SIE
Minor
201
Head diameter (3.5)
SIE
202
Head height (3.5)
SIE
203
Under head to end (shank) (3.5)
SIE
204
Overall length (3.5)
SIE
205
Shank chamfer diameter (3.5)
SIE
206
Head chamfer length (3.5)
SIE
207
Hole size (3.5)
Gage
208
Protective finish missing or incomplete (3.3)
Visual
209
Evidence of rust, pitting or spotting after
Visual
Passivation test (4.4.4)
*SIE - Standard Inspection Equipment
4.4 Tests.
4.4.1 Chemical analysis. Pins taken as specified in 4.2.2.2 shall be subjected to a chemical
analysis to determine conformance to 3.1.1, 3.1.2 or 3.1.3, as applicable. The test shall be
conducted in accordance with ASTM E1282. A manufacturer's material certificate may be
accepted in lieu of this test.
4.4.2 Hardness. Pins taken as specified in 4.2.2.2 shall be subjected to a hardness test to
determine conformance to 3.2. The test shall be conducted in accordance with ASTM E18.
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