Project Description

M28876 Fiber Optic Connectors

Circular Connectors

Amphenol Fiber Systems International (AFSI) manufactures a complete line of circular fiber optic connectors designed and qualified to MIL-PRF-28876, Rev. E. These connectors are precision-machined to stringent tolerances and designed to provide superior optical performance in extreme environmental conditions.

The backshells feature the QuickLoc captivation system developed by AFSI. Not only is it simple to install, it is also easy to remove the captivated aramid yarn of the cable and recapture without cutting back the cable. The QuickLoc backshell also allows easy access to maintain or reconfigure termini without altering the captivated aramid fiber.


  • Precision-machined to MIL-PRF-28876, Rev. E specification
  • Available in three shell sizes: 13 (4-channel), 15 (6, 8-channel), 23 (18, 31-channel)
  • Six keying options, plus universal keying for Commercial-Off-The-Shelf (COTS) product, for both plugs and receptacles
  • Inserts are interchangeable from plug to receptacle; either can be operated with pins or socket termini
  • Fully intermateable with all qualified M28876 connectors
  • Operates with all qualified single mode or multimode M29504/14 and /15 termini
  • Complete line of straight, 45 degree and 90 degree backshells


  • US Navy shipboard, surface craft and submarines
  • Mission critical combat and communications systems
  • Mobile tactical shelters electronic battlefield networks
  • Mobile emergency telecommunications (MET) stations
  • Deployable outdoors in harsh environments


  • MIL-PRF-28876 Rev. E QPL listed


  • Fully intermateable and interchangeable with any qualified M28876 connector manufacturer
  • Backshell design allows simplified, removable aramid yarn captivation with no mechanical crimp rings
  • Angled backshells use the same tools as the straight backshell
  • QuickLoc design enables faster maintenance or repair without complete dissemble of connector backshell assembly
  • COTS versions are available in aluminum and other materials

Options Available

  • Materials: aluminum (other materials available on COTS basis)
  • Finish: olive drab cadmium over electroless nickel (other finishes available on COTS basis)


Description Measurement/Detail
Mating Durability 500 cycles per EIA-455-21
Vibration Per MIL-STD-1344, Method 2005, Condition II & VI
Mechanical Shock Per MIL-STD 901C Grade A
Thermal Shock -54°C to +65°C per MIL-STD-1344, Method 1003
Thermal Cycling -62°C to +70°C per MIL-STD-1344
Corrosion Resistance 500 hour salt spray MIL-STD-1344, Method 1001
Ozone Exposure Per MIL-STD-1344, Method 1007
Humidity 10 cycles per MIL-STD-1678, Method 4030
Fluid Immersion Per MIL-STD-1344, Method 1016
Crush Resistance Seven tests @ 1250 Newton per MIL-STD-1344, Method 2008.1
Maintenance Aging Per MIL-STD-1344, Method 2002
Terminus Retention Force 22 lb min. per MIL-STD-1344, Method 2007
Insert Retention Axial 100 PSI min. per MIL-STD-1344, Method 2010
Cable Pull Out Force 162 lb min. per EIA-455-6
Cable Sealing Flexing Per MIL-STD-1344, Method 2017
Impact Per MIL-STD-1344, Method 2015
Flammability Per MIL-STD-1344, Method 1012
Operating Temperature -28°C to +65°C
Storage Temperature -40°C to +70°C
Typical Insertion Loss 0.4 dB nominal multi-mode 0.5 db nominal single mode
Connector Insert Aluminum alloy, anodized
Connector, Backshells, and Dust Cover Aluminum alloy, cad plate, 316l stainless steel, 303 stainless steel
Cable Sealing Strain Relief Polyolefin, self encapsulating