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(R2021) MIL-PRF-28876F_I1_-002.pdf
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(R2021) MIL-PRF-28876F_I1_-002.pdf
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Comments, suggestions, or questions on this document should be addressed to Commander, Naval Sea Systems
Command, ATTN: SEA 05S, 1333 Isaac Hull Avenue, SE, Stop 5160, Washington Navy Yard DC 20376-5160 or
emailed to CommandStandards@navy.mil, with the subject line “Document Comment”. Since contact information
can change, you may want to verify the currency of this address information using the ASSIST Online database at
https://assist.dla.mil.
AMSC N/A FSC 6060
DISTRIBUTION STATEMENT A. Approved for public release. Distribution is unlimited.
INCH-POUND
MIL-PRF-28876F(SH)
w/INT. AMENDMENT 1
14 April 2021
USED IN LIEU OF
MIL-PRF-28876F
1 March 2021
PERFORMANCE SPECIFICATION
CONNECTORS, FIBER OPTIC, CIRCULAR, PLUG AND RECEPTACLE STYLE,
MULTIPLE REMOVABLE TERMINI, GENERAL SPECIFICATION FOR
This specification is approved for interim use by the Naval Sea Systems Command. Other activities in the
Department of Defense may use this interim amendment or may continue using MIL-PRF-28876F.
1. SCOPE
1.1 Scope. This specification covers circular, plug and receptacle style, multiple removable termini, fiber optic
connectors (see 6.10.3) that are for Department of Defense applications and that are compatible with multiple
transmission element cables. Fiber optic connectors specified herein cover a family of general purpose,
interconnection hardware providing a variety of compatible optical coupling arrangements. Connector parts
specified within this specification include connector shells (see 6.10.11), connector inserts (see 6.10.5), connector
insert retention nuts (see 6.10.7), connector backshells (see 6.10.2), and connector dust cover (see 6.10.4).
1.2 Classification. Plug and receptacle styles, as specified in the applicable specification sheet (see 3.1),
include straight, wall-mounted (panel-mounted), jamnut-mounted, right angle, and other connector configurations as
required for cable system applications.
1.2.1 Termini classification. Termini are classified as described in MIL-PRF-29504.
1.2.2 Connector classification. Connectors fabricated to this specification are classified as follows:
a. Aluminum with conductive plating.
b. Aluminum with non-conductive plating.
1.3 Part or identifying number (PIN).
M
28876
/XX
XXXXX
X
X
Prefix for
Military
Specification
Specification
Number
Spec Sheet
No. (see 3.1)
Four- or five-character
alpha-numeric (e.g., shell
size designator, insert
arrangement,
terminus/insert style, key
position) (see 3.1)
Backshell
designator,
when specified
(see 3.1)
Class
(finish/plating)
designator, when
specified
(see 3.1)
Example: M28876/1A1P1N
Source: https://assist.dla.mil -- Downloaded: 2022-11-29T17:09Z
Check the source to verify that this is the current version before use.
MIL-PRF-28876F(SH)
w/INT. AMENDMENT 1
2
2. APPLICABLE DOCUMENTS
2.1 General. The documents listed in this section are specified in sections 3 and 4 of this specification. This
section does not include documents cited in other sections of this specification or recommended for additional
information or as examples. While every effort has been made to ensure the completeness of this list, document
users are cautioned that they must meet all specified requirements of documents cited in sections 3 and 4 of this
specification, whether or not they are listed.
2.2 Government documents.
2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a
part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are
those cited in the solicitation or contract.
DEPARTMENT OF DEFENSE SPECIFICATIONS
MIL-DTL-901
-
Shock Tests, H.I. (High-Impact) Shipboard Machinery, Equipment, and
Systems, Requirements for
MIL-PRF-8625
-
Anodic Coatings for Aluminum and Aluminum Alloys
MIL-PRF-29504
-
Termini, Fiber Optic Connector, Removable, General Specification for
MIL-PRF-29504/14
-
Termini, Fiber Optic, Connector, Removable, Environment Resisting, Pin
Terminus, Front Release Ceramic Ferrule, (for MIL-C-28876 Connectors)
MIL-PRF-29504/15
-
Termini, Fiber Optic, Connector, Removable, Environment Resisting, Socket
Terminus, Front Release, Ceramic Ferrule, (for MIL-C-28876 Connectors)
MIL-PRF-49291/6
-
Fiber, Optical, Type I, Class I, Size IV, Composition A, Wavelength B,
Radiation Resistant (Metric)
MIL-PRF-49291/7
-
Fiber, Optical, Type II, Class 5, Size II, Composition A, Wavelength D,
Radiation Resistant (Metric)
(See ASSIST database for list of specification sheets).
DEPARTMENT OF DEFENSE STANDARDS
MIL-STD-1373
-
Screw-Thread, Modified, 60 Degrees Stub, Double
MIL-STD-1678-2
-
Fiber Optic Cabling Systems Requirements and Measurements (Part 2: Optical
Measurements) (Part 2 of 6 Parts)
MIL-STD-1678-3
-
Fiber Optic Cabling Systems Requirements and Measurements Physical,
Mechanical, Environmental and Material Measurements (Part 3 of 6 Parts)
MIL-STD-1678-4
-
Fiber Optic Cabling Systems Requirements and Measurements (Part 4: Test
Sample Configuration and Fabrication Requirements) (Part 4 of 6 Parts)
MIL-STD-2042
-
Fiber Optic Cable Topology Installation Standard Methods for Naval Ships
MIL-STD-2042-6
-
Fiber Optic Cable Topology Installation Standard Methods for Surface Ships
and Submarines (Tests) (Part 6 of 7 Parts)
MIL-HDBK-454
-
General Guidelines for Electronic Equipment
(Copies of these documents are available online at https://quicksearch.dla.mil/.)
Source: https://assist.dla.mil -- Downloaded: 2022-11-29T17:09Z
Check the source to verify that this is the current version before use.
MIL-PRF-28876F(SH)
w/INT. AMENDMENT 1
3
2.3 Non-Government publications. The following documents form a part of this document to the extent
specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or
contract.
AEROSPACE INDUSTRIES ASSOCIATION (AIA)
NASM20995
-
Wire, Safety or Lock
(Copies of this document are available online at www.aia-aerospace.org.)
ASTM INTERNATIONAL
ASTM D1149
-
Standard Test Methods for Rubber Deterioration-Cracking in an Ozone Controlled
Environment
(Copies of this document are available online at www.astm.org.)
ELECTRONIC INDUSTRIES ALLIANCE (EIA)
EIA-359
-
Colors for Color Identification and Coding
EIA-364-81
-
Combustion Characteristics of Connector Housings, Connector Assemblies and
Sockets
(Copies of these documents are available online at www.ihs.org.)
SAE INTERNATIONAL
SAE AMS-C-26074
-
Electroless Nickel Coatings
(Copies of this document are available online at www.sae.org.)
INTERNATIONAL ELECTROTECHNICAL COMMISSION (IEC)
IEC 62321-7-1
-
Determination of Certain Substances in Electrotechnical Products - Part 7-1:
Presence of Hexavalent Chromium (Cr(VI)) in Colourless and Coloured
Corrosion-Protected Coatings on Metals by the Colorimetric Method
(Copies of this document are available online at www.iec.ch.)
TELECOMMUNICATIONS INDUSTRY ASSOCIATION (ITA)/EIA
TIA-455
-
General Requirements for Standard Test Procedure for Fiber Optic Fibers,
Cables, Transducers, Sensors, Connecting and Terminating Devices, and Other
Fiber Optic Components
TIA-455-2
-
Impact Test Measurements for Fiber Optic Devices
TIA-455-6
-
FOTP-6 Cable Retention Test Procedure for Fiber Optic Cable Interconnecting
Devices
TIA-455-13
-
FOTP-13 Visual and Mechanical Inspection of Fiber Optic Components,
Devices, and Assemblies
TIA-455-21
-
FOTP-21 Mating Durability of Fiber Optic Interconnecting Devices
TIA-455-26
-
FOTP-26 Crush Resistance of Fiber Optic Cable Interconnecting Devices
TIA-455-35
-
FOTP-35 Fiber Optic Component Dust (Fine Sand) Test
TIA-455-36
-
FOTP-36 Twist Test for Fiber Optic Connecting Devices
Source: https://assist.dla.mil -- Downloaded: 2022-11-29T17:09Z
Check the source to verify that this is the current version before use.
MIL-PRF-28876F(SH)
w/INT. AMENDMENT 1
4
TIA/EIA-455-1
-
Cable Flexing for Fiber Optic Interconnecting Devices
(Copies of these documents are available online at www.tiaonline.org/.)
2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a conflict between
the text of this document and the references cited herein (except for related specification sheets), 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 Specification sheets. The individual item requirements shall be as specified herein and in accordance with
the applicable specification sheet. In the event of any conflict between the requirements of this specification and the
specification sheet, the latter shall govern.
3.2 Qualification. Fiber optic connectors and accessories furnished under this specification shall be products
that are authorized by the qualifying activity for listing on the applicable qualified products list before contract
award (see 4.5 and 6.3). The provisions of 4.5.4 for retention of qualification are included in this requirement.
3.3 Materials. Materials shall be as specified herein and in the applicable specification sheet. In all cases,
materials selected for use shall meet all qualification requirements as specified, and be of a type and quality to assure
physical, chemical, and optical compatibility with the requirements of this specification. All materials used shall be
nontoxic (see 3.3.5), non-nutrient to fungus (see 3.14.13), and manufactured to good workmanship quality
(see 3.10.4). Materials chosen shall be the lightest practicable material suitable for the intended use. Materials shall
not interfere with or degrade the terminus (see 6.10.12) cleaning operation and shall be estimated to provide 20-year
service.
3.3.1 Connector Parts. Connector shells shall be aluminum. Connector inserts shall be either aluminum or
polymer material. Backshells, insert retention nuts, and dust covers shall be either aluminum or a polymer material.
Hex nuts provided with a jamnut mounted connector receptacle shall conform to the class designator, except jamnut
receptacles with non-conductive plating where the hex nut may be CRES, passivated.
3.3.2 Finish. The resultant finish on all connector parts shall meet the requirements herein and be as follows.
3.3.2.1 Aluminum components. The finish used for external parts shall minimize reflections and shall meet the
requirements herein. The finish used for internal parts shall be corrosion resistant.
3.3.2.2 Finish color. Acceptable color on connectors, plug shell, receptacle shell, backshell, and dust cover
shall be identified for each finish.
3.3.2.3 Non-conductive finish, aluminum components. The plating of the connectors, plug shell, receptacle
shell, backshell, and dust cover shall have a non-conductive coating in accordance with MIL-PRF-8625, type III,
class 2, sealed or unsealed, with supplemental impregnated, polytetrafluoroethylene (PTFE) coating. Supplemental
PTFE coating shall be the result of impregnating PTFE into the surface asperities of the anodic coating. Buildup per
surface for this nonconductive finish shall be between 0.0007 and 0.0012 inch. Color of the non-conductive finish
shall be in accordance with 3.3.2.2. A lubricant shall be applied to the connector plug internal coupling nut threads
and shall satisfy the lubricant requirements in 3.3.9. A dry film lubricant may be applied to the connector receptacle
external mating male threads. For backshells with a base material of die cast aluminum where type III anodize is
limited in accordance with MIL-PRF-8625, type II anodize may be used when the procuring activity does not
authorize type III. For inserts, a non-conductive coating in accordance with MIL-PRF-8625, type II, type III sealed,
or type III unsealed shall be used. Connectors, plug shell, receptacle shell, backshell, and dust cover shall be black
as identified in EIA-359. Color shall be minimally reflective.
Source: https://assist.dla.mil -- Downloaded: 2022-11-29T17:09Z
Check the source to verify that this is the current version before use.
MIL-PRF-28876F(SH)
w/INT. AMENDMENT 1
5
3.3.2.4 Conductive plating, aluminum components. When specified (see 3.1), the plating of the connectors,
plug shell, receptacle shell, backshell, and dust cover shall be tin-zinc alloy in accordance with SAE AMS2434,
type 2, grade A or B with a composition of 70 to 85 percent tin and 15 to 30 percent zinc, 0.0005-inch thick
minimum, over electroless nickel in accordance with SAE AMS-C-26074, grade A or B or other similar underplate.
Following chromium conversion process, if applicable, and subsequent processing, finish shall be trivalent
chromium and shall meet performance requirements. The color shall be gold to bronze, including pale green to olive
and brown, or black, and non-reflective (some iridescence permitted but is not preferred). The final finish shall be
electrically conductive, shall withstand 500 hours of dynamic salt spray, shall meet the requirements of the
hexavalent chromium detection testing, and shall operate in a temperature range of -67 °F to +347 °F (-55 °C to
+175 °C). The finish shall be negative for hexavalent chromium (Cr[VI]) when tested in accordance with
IEC 62321-7-1, boiling water extraction procedure.
3.3.2.5 CRES components. Unless otherwise specified (see 3.1), all exposed corrosion resistant steel parts
shall be passivated and shall be treated to minimize reflections. CRES threads shall be treated in a manner to
minimize galling and cold welding with mating parts. CRES parts which may be mated to non-CRES parts shall be
treated to minimize scratching or damage to mating components during mating operations.
3.3.3 Recycled, recovered, environmentally preferable, or biobased materials. Recycled, recovered,
environmentally preferable, or biobased materials should be used to the maximum extent possible, provided that the
material meets or exceeds the operational and maintenance requirements, and promotes economically advantageous
life cycle costs. Unless otherwise specified herein, all equipment, material, and articles incorporated in the products
covered by this specification shall be new and shall be fabricated using materials produced from recovered materials
to the maximum extent practicable without jeopardizing the intended use. The term “recovered materials” means
materials which have been collected or recovered from solid waste and reprocessed to become a source of raw
materials, as opposed to virgin raw materials. None of the above shall be interpreted to mean that the use of used or
rebuilt products is allowed under this specification unless otherwise specifically specified.
3.3.4 Nonmetallic materials. Nonmetallic materials used in connector parts shall not be degraded by the use of
solvents or cleaning agents, nor be degraded at the environmental conditions specified in 3.14.
3.3.5 Toxicity. Materials used in the connectors, backshells, insert retention nuts, and dust covers shall not
give off toxic or explosive fumes when exposed to flame. When evaluated in accordance with 4.9, materials used
shall pose no serious or high risk to the health of personnel or the environment when used for its intended purpose
(see 4.9 and 6.6).
3.3.6 Metals. Metals shall be corrosion resistant or treated to be corrosion resistant. Unless otherwise specified
(see 3.1), metals shall be nonmagnetic.
3.3.7 Dissimilar metals. The use of dissimilar metals in intimate contact should be avoided. When dissimilar
metals are used in intimate contact with each other, protection against electrolysis and corrosion shall be provided.
3.3.8 Sealing compounds. Sealing compounds shall not flow at the maximum specified storage temperature or
exhibit cracking at the minimum specified storage temperature.
3.3.9 Lubricants. Lubricants used in the construction of the connectors shall satisfy the following criteria:
a. Lubricants shall be permanent and shall not require replacement during the lifetime of the connector.
b. Lubricants shall not migrate to the optical interfaces resulting in the degradation of optical performance.
c. Lubricants shall be useful over the environmental conditions specified herein.
d. Lubricants shall not be affected by cleaning solvents.
e. Lubricants shall not corrode or otherwise degrade connector parts.
3.4 Design and construction. Connector parts shall be in accordance with figures A-1 through A-8 and as
specified (see 3.1). Connector parts include connector (see 3.5), backshell (see 3.6) and dust cover (see 3.8), and
other parts as specified (see 3.1).
Source: https://assist.dla.mil -- Downloaded: 2022-11-29T17:09Z
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