MIL-DTL-40082C
2.3 Order of precedence. In the event of a conflict between the text of this document and
the references cited herein, the text of this document takes precedence. Nothing in this
document, however, supersedes applicable laws and regulations unless a specific exemption
has been obtained.
3. REQUIREMENTS
3.1 Design. The heraldic design of the hub or die shall be transferred by reducing
device from the Government-loaned drawing or sculpted model to the size specified in the
procurement document (see 6.2). When an existing hub or die is used for manufacturing
purposes, the heraldic design of the new hub or die shall be an exact replica of the
Government-loaned hub or die.
3.2 Material. Material for hubs and dies shall be alloy tool steel conforming to S7 or L6
of ASTM-A681. (For verification, see 4.2.1.) Typical composition is shown in Table I. The
use of any other steel shall not be permitted under this specification.
TABLE I. Steels and their typical composition.
C*
Mn*
Si*
Cr*
Mo*
Ni*
Remainder*
Name
S7
0.50
0.75
0.25
3.25
1.40
--
Fe
L6
0.70
0.60
0.25
0.70
--
1.40
Fe
* carbon (C), manganese (Mn), silicon (Si), chromium (Cr), molybedenum (Mo),
nickel (Ni), and iron (Fe)
3.3 Construction.
3.3.1 Sizes of hubs and dies. The minimum height of hubs and dies shall be 2 inches
for heraldic designs under 4 inches in length, width, or diameter. The minimum height of
hubs and dies for heraldic designs 4 inches and over in length, width, or diameter shall be
2-1/2 inches. The width, length, or diameter of any hub shall provide a minimum of 3/8 inch
clearance between the outside edge of the design and the edge of the hub. The length,
width, or diameter of any die shall provide a minimum of 1/2 inch clearance between the
outside edge of the design and the edge of the die. There shall be sufficient cutaway or
relieved area around the embossing on each hub (driving area) to insure penetration past
the embossed design when driving the hub into the working die.
3.3.2. Shapes of hubs and dies. Unless otherwise specified (see 6.2), the shape of the
hubs and dies shall be round, square, or rectangular.
3.3.3 Cutting of hubs and dies.
3.3.3.1 Cutting of hubs and dies for items with no enamel/epoxy. For designs with
outer rims, hubs and dies for items requiring no enamel or epoxy shall be cut with a
minimum depth of 0.030 inch from the top of the design to the bottom of the design. For
designs without outer rims, hubs and dies requiring enamel shall be cut with a minimum
depth of 0.020 inch from the top of the design to the bottom of the design. The height or
depth of modeled areas or detail lines shall be determined by the tool-maker as appropriate
for the individual design of the heraldic item. Design walls shall be cut with a cutting tool
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