MIL-DTL-2427H (AR)
Conformance inspection by classification of characteristics
PARAGRAPH
TITLE
DRAWING NUMBER
4.3.2.1
Assembly
drawing indicated by
SHEET 6 OF 7
contract
NEXT HIGHER ASSEMBLY
EXAMINATION OR TEST
Grade
CONFORMANCE
REQUIREMENT
INSPECTION METHOD
CLASSIFICATION
A
B
C
CRITERIA
PARAGRAPH
REFERENCE
Minor
224
x Marking misleading or unidentifiable
Level II
3.9
Visual
225
x Solid knot in nailing edge or under
hardware split by nail, screw, or
milling operation (See Note 1)
Level II
3.3.3
Visual
226
x Nails, not in pattern shown on drawing
or as required by the specification
Level II
3.7.3
Visual
227
x Split terminating in edge of board
Level II
3.3.2
Visual
Note 1. Knots in nailing edges or underneath hardware require particular attention. When nails are driven through them, knots may crack or breakout, appreciably
weakening the construction. This sometimes can be corrected by extra wood if nails can be placed in a proper location in solid wood. When such a successful repair is
presented, the box should be considered acceptable. If the attempted repair results in further cracking, however, the box shall be classed defective. Knots in the place of
attachment of hardware often crack sufficiently to loosen the hardware when screws are tightened. Milling operations necessary for the insetting of hardware also often
cause such knots to crack, making proper attachment of the hardware impossible. These two conditions cannot be repaired and the box shall be classed defective.
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