MIL-DTL-46027K(MR)
3.7 Dimensions. Dimensions and tolerances shall be as specified in the contract or order
(see 6.2).
3.7.1 Tolerances. Unless otherwise specified in the contract or order (see 6.2), the plates
submitted for acceptance shall not vary from the specified dimensions by an amount as
specified in Table III.
TABLE III. Thickness tolerances.
SPECIFIED WIDTH (Inches)
Ordered Thickness
OVER
0.00
39.37
59.06
78.74
98.43
118.11
137.80
157.48
(Inches)
THRU
39.37
59.06
78.74
98.43
118.11
137.80
157.48
177.17
TOLERANCES - INCHES (PLUS and MINUS)
OVER
THRU
0.012
0.014
0.015
0.018
0.022
0.027
0.035
0.043
0.250
0.315
0.015
0.017
0.020
0.023
0.027
0.033
0.041
0.051
0.315
0.394
0.023
0.023
0.027
0.032
0.035
0.043
0.053
0.065
0.394
0.630
0.031
0.031
0.037
0.043
0.047
0.058
0.070
0.085
0.630
0.984
0.039
0.039
0.047
0.055
0.065
0.075
0.090
0.105
0.984
1.575
0.055
0.055
0.060
0.070
0.085
0.100
0.115
---
1.575
2.362
0.075
0.075
0.085
0.100
0.105
0.125
---
---
2.362
3.000
3.8 Marking for identification. Unless otherwise specified in the contract or purchase
order (see 6.2) each plate shall be marked on one plate edge with the manufacturer's name
or trademark, the basic number of this specification, the plate thickness in inches, the
alloy designation and the lot number or code relating to the lot number (see 4.2). The
height of the characters shall be 3/8 of an inch or greater. Impression stamping shall not
be used unless permitted by the procuring activity (see 6.2). Each plate shall be marked
in lengthwise rows of characters recurring at intervals not greater than 3 feet, the rows
being spaced not more than 6 inches apart and alternately staggered. The characters shall
be not less than 3/8 inch in height and shall be applied using a suitable marking fluid
whose residue shall contain not more than traces of halogen-bearing compounds and shall
be capable of being removed in hot alkaline cleaning solution without rubbing. The
markings shall have no deleterious effect on the plate material or its performance and
shall be sufficiently stable to withstand normal handling.
3.8.1 Ballistic test plates. In addition to the markings in 3.8, each ballistic test plate shall
be marked with the letters `PRE' for First Article test plates and `ACC' for Acceptance
test plates. This marking shall be impression stamped on the horizontal edge face of the
ballistic plate in letters 3/8 inch high or greater. Ballistic retest plates shall be marked
"R1" and "R2" respectively (see A.5.2).
3.9 Ballistic test plate information. For each lot of aluminum alloy armor a properly
completed Aluminum Armor Test Data Form (See Figure 1) shall be submitted with each
ballistic test plate that represents that particular processing lot.
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