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NPFC - MIL-C-28840

CONNECTORS, ELECTRICAL, CIRCULAR THREADED, HIGH DENSITY, HIGH SHOCK SHIPBOARD, CLASS D, GENERAL SPECIFICATION FOR

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Organization: NPFC
Publication Date: 26 May 1981
Status: inactive
Page Count: 45
scope:

This specification covers circular electrical connectors with removable crimp front release contacts. These connectors are for use with jacketed cable in shipboard applications.

These connectors are rated for specified operation within a temperature range of −55 C (−67 F) to 200 C (392 F). The upper temperature is the maximum internal hot-spot temperature resulting from any combination of electrical load and ambient conditions.

Insulation resistance limits vary with temperature (see Figure 1).

Service life varies with temperature (see Figure 2 and Table I).

The connector part number for qualified connectors procured in accordance with this specification shall consist of the letter "M", the basic number of the applicable specification sheet and the applicable alphanumeric characters formulated as in the following examples. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Naval Electronic Systems Command, Department of the Navy, Washington, DC 20360, by using the selfaddressed Standardization Document Improvement Proposal DD Form 1426) appearing at the end of this document or by letter. TABLE I Connector Classes - Physical Characteristics

Shell and Coupling Ranges Fluid Class Hot Spot Service Insert ---------------------------- Code Class Feature Temperature (°C) Life Material Material Finish Resistance ------------------------------------------------------------------------------------------------------------------------------------ Cadmium A D High Impact 125 20 yrs. Fluoro Wrought olive drab Complete Shock 200 1/ 1000 hrs. silicone Aluminum over nickel Aluminum over nickel B DS High Impact 125 20 yrs. " Carbon Cadmium Complete 200 1/ 1000 hrs. Resistant Steel 316 C DJ High Impact 125 20 yrs. " Wrought Cadmium Complete shock with 200 1/ 1000 hrs. Aluminum olive drab backshell over nickel connector assembly E DJS High Impact 125 20 yrs. " Carbon Cadmium Complete shock with 200 1/ 1000 hrs. Resistant Steel backshell 316 connector assembly Note: 1/ Hot spot test requirement for inserts and seals shall be 200°C.

The class of the connector shall be identified as shown in Table I.

The shell size shall be identified as shown in Table II. TABLE II Shell Sizes

Designator Sizes ------------------------- A 11 B 13 C 15 D 17 E 19 F 23 G 25 H 29 J 33

The insert arrangement shall be a single digit indicating the insert pattern in accordance with the applicable insert arrangement in MIL-STD-1698.

The following designators shallidentify the various contact styles.

P- Pin Contacts -20-22 S- Socket Contacts -20-22 D- Pin Contacts -20-28 E- Socket Contacts -20-28 F- Pin Contacts -20-20 G- Socket Contacts -20-20

The key or key way position shall be identified by the appropriate number 1, 2, 3, 4, 5 or 6 in accordance with Figure 3.

The backshell designator shall be identified by the appropriate letter A, B, C, or D in accordance with applicable specification sheets.

Connectors shall have a threaded coupling in accordance with Figures 8 and 9.

Receptacle mounting shall be designed as follows:

Flange Jam Nut

The contact designation shall be as specified in MIL-C-39029.

The wire ranges given in Table III shall be accommodated by the connectors as indicated. TABLE III Wire Range Accommodations

Contact Wire Outside Diameter of Finished Wire (inch) 1/ -------------------------------------------------- Size Size Minimum Maximum -------------------------------------------------------------------- 20-20 24 .040 .070 22 .040 .070 20 .040 .070 20-22 26 .040 .070 24 .040 .070 22 .040 .070 20-28* 32 .040 .070 30 .040 .070 28 .040 .070 * To obtain sealing, wires must be built up to finished wire diameter (see 6.1.1). 1/ In accordance with MIL-C-915 and MIL-W-16878.

intended Use:

The various classes and types of connectors are intended for application as follows:

a. MIL-C-28840/10 - are receptacles intended for wall or bulkhead flange mounting and for use with... View More

Document History

August 2, 2019
CONNECTORS, ELECTRICAL, CIRCULAR, THREADED, HIGH SHOCK, HIGH DENSITY, SHIPBOARD, CLASS D, GENERAL SPECIFICATION FOR
The various classes and types of connectors are intended for applications as follows: a. MIL-DTL-28840/10 - are receptacles intended for wall or bulkhead flange mounting and are for use with...
April 9, 2019
CONNECTORS, ELECTRICAL, CIRCULAR, THREADED, HIGH SHOCK, HIGH DENSITY, SHIPBOARD, CLASS D, GENERAL SPECIFICATION FOR
Scope. This specification covers circular electrical connectors with removable crimp type, front release contacts. These connectors are for use with jacketed cables in shipboard applications.
July 18, 2017
CONNECTORS, ELECTRICAL, CIRCULAR, THREADED, HIGH SHOCK, HIGH DENSITY, SHIPBOARD, CLASS D, GENERAL SPECIFICATION FOR
The various classes and types of connectors are intended for application as follows: a. MIL-DTL-28840/10 - are receptacles intended for wall or bulkhead flange mounting and are for use with conduit,...
November 21, 2013
CONNECTORS, ELECTRICAL, CIRCULAR, THREADED, HIGH SHOCK, HIGH DENSITY, SHIPBOARD, CLASS D, GENERAL SPECIFICATION FOR
A description is not available for this item.
November 7, 2013
CONNECTORS, ELECTRICAL, CIRCULAR, THREADED, HIGH SHOCK, HIGH DENSITY, SHIPBOARD, CLASS D, GENERAL SPECIFICATION FOR
The various classes and types of connectors are intended for application as follows: a. MIL-DTL-28840/10 - are receptacles intended for wall or bulkhead flange mounting and are for use with conduit,...
November 5, 2010
CONNECTORS, ELECTRICAL, CIRCULAR, THREADED, HIGH DENSITY, HIGH SHOCK, SHIPBOARD, CLASS D, GENERAL SPECIFICATION FOR
The various classes and types of connectors are intended for application as follows: a. MIL-DTL-28840/10 - are receptacles intended for wall or bulkhead flange mounting and for use with conduit...
May 13, 2009
CONNECTORS, ELECTRICAL, CIRCULAR, THREADED, HIGH DENSITY, HIGH SHOCK, SHIPBOARD, CLASS D, GENERAL SPECIFICATION FOR
The various classes and types of connectors are intended for application as follows: MIL-DTL-28840/10 - are receptacles intended for wall or bulkhead flange mounting and for use with conduit...
April 26, 2007
CONNECTORS, ELECTRICAL, CIRCULAR, THREADED, HIGH DENSITY, HIGH SHOCK, SHIPBOARD, CLASS D, GENERAL SPECIFICATION FOR
A description is not available for this item.
April 26, 2007
CONNECTORS, ELECTRICAL, CIRCULAR, THREADED, HIGH DENSITY, HIGH SHOCK, SHIPBOARD, CLASS D, GENERAL SPECIFICATION FOR
The various classes and types of connectors are intended for application as follows: a. MIL-DTL-28840/10 - are receptacles intended for wall or bulkhead flange mounting and for use with conduit...
May 5, 2000
CONNECTORS, ELECTRICAL, CIRCULAR THREADED, HIGH DENSITY, HIGH SHOCK SHIPBOARD, CLASS D, GENERAL SPECIFICATION FOR
A description is not available for this item.
August 5, 1993
CONNECTORS, ELECTRICAL, CIRCULAR THREADED, HIGH DENSITY, HIGH SHOCK SHIPBOARD, CLASS D, GENERAL SPECIFICATION FOR
A description is not available for this item.
April 1, 1993
CONNECTORS, ELECTRICAL, CIRCULAR THREADED, HIGH DENSITY, HIGH SHOCK SHIPBOARD, CLASS D, GENERAL SPECIFICATION FOR
A description is not available for this item.
June 25, 1984
CONNECTORS, ELECTRICAL, CIRCULAR THREADED, HIGH DENSITY, HIGH SHOCK SHIPBOARD, CLASS D, GENERAL SPECIFICATION FOR
A description is not available for this item.
June 21, 1982
CONNECTORS, ELECTRICAL, CIRCULAR THREADED, HIGH DENSITY, HIGH SHOCK SHIPBOARD, CLASS D, GENERAL SPECIFICATION FOR
A description is not available for this item.
October 5, 1981
CONNECTORS, ELECTRICAL, CIRCULAR THREADED, HIGH DENSITY, HIGH SHOCK SHIPBOARD, CLASS D, GENERAL SPECIFICATION FOR
A description is not available for this item.
MIL-C-28840
May 26, 1981
CONNECTORS, ELECTRICAL, CIRCULAR THREADED, HIGH DENSITY, HIGH SHOCK SHIPBOARD, CLASS D, GENERAL SPECIFICATION FOR
This specification covers circular electrical connectors with removable crimp front release contacts. These connectors are for use with jacketed cable in shipboard applications. These connectors are...
May 26, 1981
CONNECTORS, ELECTRICAL, CIRCULAR THREADED, HIGH DENSITY, HIGH SHOCK SHIPBOARD, CLASS D, GENERAL SPECIFICATION FOR
A description is not available for this item.
March 7, 1980
CONNECTORS, ELECTRICAL, CIRCULAR THREADED, HIGH DENSITY, HIGH SHOCK SHIPBOARD, CLASS D, GENERAL SPECIFICATION FOR
A description is not available for this item.
October 4, 1979
CONNECTORS, ELECTRICAL, CIRCULAR THREADED, HIGH DENSITY, HIGH SHOCK SHIPBOARD, CLASS D, GENERAL SPECIFICATION FOR
A description is not available for this item.
July 11, 1979
CONNECTORS, ELECTRICAL, CIRCULAR THREADED, HIGH DENSITY, HIGH SHOCK SHIPBOARD, CLASS D, GENERAL SPECIFICATION FOR
A description is not available for this item.
April 11, 1979
CONNECTORS, ELECTRICAL, CIRCULAR THREADED, HIGH DENSITY, HIGH SHOCK SHIPBOARD, CLASS D, GENERAL SPECIFICATION FOR
A description is not available for this item.
March 16, 1979
CONNECTORS, ELECTRICAL, CIRCULAR THREADED, HIGH DENSITY, HIGH SHOCK SHIPBOARD, CLASS D, GENERAL SPECIFICATION FOR
A description is not available for this item.
August 22, 1978
CONNECTORS, ELECTRICAL, CIRCULAR THREADED, HIGH DENSITY, HIGH SHOCK SHIPBOARD, CLASS D, GENERAL SPECIFICATION FOR
A description is not available for this item.
May 1, 1978
CONNECTORS, ELECTRICAL, CIRCULAR THREADED, HIGH DENSITY, HIGH SHOCK SHIPBOARD, CLASS D, GENERAL SPECIFICATION FOR
This Specification covers circular electrical connectors with removable crimp front release contacts. These connectors are for use with jacketed cable in shipboard applications.
May 1, 1978
CONNECTORS, ELECTRICAL, CIRCULAR THREADED, HIGH DENSITY, HIGH SHOCK SHIPBOARD, CLASS D, GENERAL SPECIFICATION FOR
A description is not available for this item.

References

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