MIL-DTL-28731/20E
NOTES:
1. Dimensions are in inches.
2. Metric equivalents are given for information only.
3. Tolerance shall be ± .005 (0.13 mm) unless otherwise specified. All dimensions are for parts after
plating.
4. Trim area not to exceed width of contact across retaining lance area "X".
5. Contact crimp for use with (AWG) wire range No. 26 to No. 18. Wire size No. 16 can be used with the
following exception: Insulation crimp must be crimped over conductor member only. No insulating
material is permitted in insulator crimp barrel which will hamper insertion of contact into connector
cavity.
6. Remove all burrs and sharp edges .0005 (0.013 mm) maximum.
7. Crimp tool MIL-C-22520/17-01.
8. Insertion and removal tool MIL-I-81969/13-01 and MIL-I-81969/11-01.
9. Patent Notice. Patent No. 3,248,686 owned by Elco corporation. The Government has a royalty-free
license under the above patent for the benefit of manufacturers of the items called for in this
specification, either for the government or for use in equipment to be delivered to the government.
FIGURE 1. Contact, fork type, crimp removable Continued.
REQUIREMENTS:
Dimensions and configuration: See figure 1.
Contact separation force (see configuration A):
Polished steel gage from unplated contacts: 2 to 10 ounces.
Plated gold over nickel contacts: 2 to 16 ounces.
Crimp tensile strength: Minimum tensile strength during crimp tensile strength testing shall be 40.0
pounds for AWG 16 wire.
Contact mating area: Contacts may be supplied with either overall plating or localized finish. For
localized finish the contact mating area shall be in accordance with MIL-DTL-28731.
Identification of contact: Contacts shall be permanently imprinted with manufacturer's symbol for
purpose of identifying manufacturer's product (see figure 1, detail A).
Part or Identifying Number (PIN):
M28731/20-0001 supplied loose for hand crimping installation.
M28731/20-0002 supplied on a reel for automatic crimping machine installation.
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