MIL-PRF-28876 Connectors, Fiber Optic, Circular, Plug And Receptacle Style, Multiple Removable Termini, General Specification ForThis specification covers the performance requirements for circular, plug and receptacle style, multiple removable termini, fiber optic connectors 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, connector inserts, connector insert retention nuts, connector backshells, and connector dust caps.

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MIL-PRF-28876E

3.6

Backshells and insert retention nuts.

3.6.1 Backshells. Backshells shall conform to the requirements as

specified (see 3.1). The backshells shall be provided with cable strain

relief as specified (see 3.1). The backshells shall be free of any sharp

edges or other configurations that could cause damage to optical fibers

extending through them.

3.6.2 Insert retention nuts. Insert retention nuts shall conform to the

requirements as specified (see 3.1). The insert retention nuts shall be

provided without cable strain relief as specified (see 3.1). The insert

retention nuts shall be free of any sharp edges or other configurations that

could cause damage to optical fibers extending through them.

3.7 Protective caps or covers. All optical connectors (plugs and

receptacles) shall be provided with throwaway caps or covers. The cap or

cover shall be free of mold release, lubricants, or any other contaminants.

3.8 Dust covers. Dust covers shall conform to the requirements as

specified (see 3.1). The dust covers shall be free of any sharp edges or any

other configurations that could cause damage to the optical termini.

3.9 Tools. Tools used to terminate connectors onto cables shall be as

specified (see 3.1).

3.10

Visual and mechanical.

3.10.1 Size. When examined in accordance with 4.6.2.1, the dimensions and

dimensional tolerances for the connector parts shall be as specified (see

3.1).

3.10.2 Weight. When tested in accordance with 4.6.2.2, the weight of the

connector parts shall be as specified (see 3.1).

3.10.3 Identification marking (see 4.6.2.3). Identification marking shall

be as specified in 3.10.3.1 and 3.10.3.2. Markings shall be legible and

permanent. Markings shall be legible to the extent that none are missing, in

whole or in part, faded, blurred, smeared or shifted (dislodged) and shall be

readily readable. Contrast between characters and surface shall be good.

Markings shall be permanent to the extent of withstanding cleaning procedures

and of withstanding environmental and mechanical performance tests conducted.

3.10.3.1 Connectors, backshells, and dust covers. Connectors, backshells,

and dust covers shall be identified with markings that are permanent, clearly

visible and legible. Identification marking shall include the PIN and either

the manufacturer's CAGE code, name or logo. Connectors shall also be marked

with a yellow band in accordance with EIA-359, or the phrase "FIBER OPTICS" as

specified (see 3.1).

3.10.3.2 Inserts. Marking shall correspond between mating inserts and

shall be as specified in Appendix B. Raised or depressed characters shall not

be used on mating faces. Terminus locations shall be designated by

identifiable characters on the front and rear faces of the insert or the

insert assembly. Character position and arrangement shall assure appropriate

terminus cavity identification.