MIL-C-28876 Fiber Optic Connector Products Features: Designed and manufactured IAW MIL-C-28876 Military approved (QPL). 4,8 and 31 channel sizes. CAD plated aluminum or stainless steel (303 or 316L) Multi-mode and single-mode. Easy to assemble backshells. Uses field proven MIL-T-29504 termini Perfect for environmentally harsh environments. Shipboard, fixed and deployable communication systems. Reduced installation time with crimpless QUICKLOC tm backshell. Fiber Systems International (FSI) offers rugged military and industrial multi-channel fiber optic connectors for deployable, shipboard, outdoor, and fixed communication system requirements. FSI s connectors are designed to provide the best possible optical performance in applications with extremely severe environmental conditions. 3 shell sizes are available: B, C, and F. Shell size B can accommodate up to 4, C up to 8, and Shell size F can accommodate up to 31 optical contacts. Plugs and Receptacles have 6 unique key options to prevent configuration problems on systems using multiple connectors. FSI also offers a universal key configuration on both plugs and receptacles, which are ideal for use on test cables. The backshell features the QUICKLOC Kevlar captivation system. Not only is it simple to install, it is just as easy to remove the kevlar captivation and recapture the same Kevlar without cutting back the cable. The QUICKLOC backshell also enables easy access to maintain or reconfigure termini without altering the captivated Kevlar. Standard M28876 Stainless Steel M28876 and backshells are available in both CAD plated aluminum and stainless steel. For less corrosive environmental situations the Aluminum with Cadmium (Olive Drab) Plate over Electroless nickel may be used. Stainless steel may be the ideal solution for applications where direct contact with salt spray and other corrosive elements are possible. The FSXM Series of connectors use the field proven MIL-T- 29504/14 & /15 termini. Connector Performance & Materials Specifications Parameter Specification Operating Temperature -54 C to +65 C Storage Temperature -62 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 and Backshell Aluminum Alloy, CAD Plate (FS3M) 316L Stainless Steel (FS5M) 303 Stainless Steel (FS7M) Cable Sealing Strain Relief Polyolefin, Self Encapsulating Products are currently in qualification, contact FSI for details.
Environmental Performance Test Chart Parameter Specification 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, method 1003 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 7 tests @ 1250 Newton per MIL-STD-1344, method 2008.1 Maintenance Aging Per MIL-STD-1344, method, 2002 Terminus Retention Force 22 lbs. min. per MIL-STD-1344, method 2007 Insert Retention Axial 100 PSI min. per MIL-STD-1344, method 2010 Cable Pull Out Force 162 pounds 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 FSI s MIL-C-28876 connectors have been tested against the above parameters, using the above listed procedures and have passed the parametric requirements of these specifications. MIL C-28876 Ordering Guide The following Nomenclature provides a general understanding of the MIL-C-28876 connector specifications. Use the Nomenclature in conjunction the MIL-C-28876 to FSI Part Number cross-reference to identify the necessary connector components. M28876/ MIL-C-28876 General Specification Connector Type Strain Relief Connector Wall Mount Receptacle None, Insert Retention Nut 1 Wall Mount Receptacle Straight Backshell 2 Wall Mount Receptacle 45 Degree Backshell 3 Wall Mount Receptacle 90 Degree Backshell 4 In Line Receptacle* Straight 5 Plug None, Insert Retention Nut 6 Plug Straight Backshell 7 Plug 45 Degree Backshell 8 Plug 90 Degree Backshell 9 Jam Nut Receptacle None, Insert Retention Nut 11 Jam Nut Receptacle Straight Backshell 12 Jam Nut Receptacle 45 Degree Backshell 13 Jam Nut Receptacle 90 Degree Backshell 14 Shell Size 13 B 15 C 23 F When ordering /1, /6 or /11 connectors that will use a backshell, add N to omit the unneeded Insert retention Nut and Pressure Sleeve. N = Optional, No Retention Nut Keying Position 1 thru 6 FSI uses U as the designator for Universal key Insert/Terminus P = Pin S = Socket *Non-Stock Item FSI recommends using the flange or jam nut receptacle. Inline Receptacles are special order Number of Cavities Shell Size 4 13 1 6 15 2 8 15 1 31 23 1 Insert **Non-Stock Item FSI Recommends using the 8 cavity insert and with two dummy termini to create a 6 channel connector Backshell Cable O.D Maximum Cable Diameter, Inches (mm) 0 *** 13 15 23 1.285 (7.24).515 (13.08) 1.0 (25.40) 2.346 (8.79).256 (6.50) 3.375 (9.53) ***Use 0 or omit when ordering connectors without backshells Connector types 1,6 & 11
FSI Ordering Guide for Commercial M28876 Equivalent are provided in Key positions 1 through 6 as specified in MIL-C-28876. Key position U is identified as a universal key for connectors that mate with all 6 key positions. Insert retention hardware is included with FS3MX000 series receptacles. However, the user must specify either insert retention hardware or strain relief (backshells) when ordering FS3MX000 series plugs. M28876 Plugs and Receptacles FSI Part Number Part Description M28876 Equal FS3M1000-1,6 & U 4 Channel Plug, Without Insert Retention Hardware M28876/6B1P1,6N FS3R1000 Retention Hardware for 4 Channel Plug FS3M2000-1,6 & U 8 Channel Plug, Without Insert Retention Hardware M28876/6C1P1,6N FS3R2000 Retention Hardware for 8 Channel Plug FS3M3000-1,6 & U 31 Channel Plug, Without Insert Retention Hardware M28876/6F1P1,6N FS3R3000 Retention Hardware for 31 Channel Plug FS3M6000-1,6 & U 4 Channel Flange Mount Receptacle, With Insert Retention Hardware M28876/1B1S1,6 FS3M7000-1,6 & U 8 Channel Flange Mount Receptacle, With Insert Retention Hardware M28876/1C1S1,6 FS3M8000-1,6 & U 4 Channel Jam Nut Receptacle, With Insert Retention Hardware M28876/11B11S1,6 FS3M9000-1,6 & U 8 Channel Jam Nut Receptacle, With Insert Retention Hardware M28876/11C1S1,6 FS3M4000-1,6 & U 31 Channel Flange Mount Receptacle, With Insert Retention Hardware M28876/1F1S1,6 FS3M5000-1,6 & U 31 Channel Jam Nut Receptacle, With Insert Retention Hardware M28876/11F1S1,6
FSI Ordering Guide for Commercial M28876 Equivalent Continued M28876 Family of Backshells FS3A1000-X 4 Channel straight backshell See Table 2 for Cable Size Info M28876/27BX FS3A2000-X 4 Channel 45 degree backshell, See Table 2 for cable size info. M28876/28BX FS3B3000-X 4 Channel 90 degree backshell, See Table 2 for cable size info. M28876/29BX FS3C4000-0 4 Channel Receptacle Strain Relief for up to 4, 2mm OFCC Simplex Cable(s) FSA4000-X 8 Channel straight backshell, See Table 1 for cable size info M28876/27CX FS3A5000-X 8 Channel 45 degree backshell, See Table 1 for cable size info. M28876/28CX FS3A6000-X 8 Channel 90 degree backshell. See Table 1 for cable size info. M28876/29CX FS3C7000-0 8 Channel Receptacle Strain Relief for up to 8, 2mm OFCC Simplex Cable(s) FSTF0208 Backshell Tool 4 & 8 channel retaining nut holding fixture FSTF0276 Backshell Tool Extraction and insertion tool for retaining nut spring 4 channel. FSTF0272 Backshell Tool Extraction & Insertion tool for retaining nut spring 8 channel. FSTF0541 Spring Tool for 31 Channel FSTF0542 Retaining Nut Holding Tool for 31 Channel FS3F4000-X 31 Channel straight backshell, See Table 3 for Cable Size Info. M28876/27FX FS3F5000-X 31 Channel 45 degree backshell, See Table 3 for Cable Size Info. M28876/28FX FS3F6000-X 31 Channel 90 degree backshell, See Table 3 for Cable Size Info. M28876/29FX Table 1 X = Table 2 X = Table 3 X = 1 0.466 0.515 1 0.28 0.315 1 0.768 0.868 2 0.381 0.423 2 0.305 0.346 2 0.90 1.0 3 0.424 0.465 4 0.305 0.346 5 0.347 0.380
M28876 Dust Caps FSI Part Number Dust Cap Description M28876 Equal FS3MG000-1 Dust Cap, 4 channel plug, chain with bail M28876/10BBW FS3MG000-5 Dust Cap, 4 channel plug without chain M28876/10BEW FS3MH000-1 Dust Cap, 8 channel plug, chain with bail M28876/10CBW FS3MH000-5 Dust Cap, 8 channel plug without chain M28876/10CEW FS3MK000-1 Dust Cap, 4 channel flange mount receptacle, chain with fastener M28876/15BAW FS3MK000-2 Dust Cap, 4 channel jam nut receptacle, chain with ring M28876/15BBW FS3ML000-1 Dust Cap, 8 channel flange mount receptacle, chain with fastener M28876/15CCW FS3ML000-2 Dust Cap, 8 channel jam nut receptacle, chain with ring M28876/15CBW FS3MP000-1 Dust Cap, 31 channel plug, chain with bail M28876/10DBW FS3MP000-5 Dust Cap, 31 channel plug, without chain M28876/10DEW FS3MS000-1 Dust Cap, 31 channel receptacle, chain with bail M28876/15DBW FS3MS000-2 Dust Cap, 31 channel receptacle, chain with ring (teardrop) M28876/15DBW FS3MS000-3 Dust Cap, 31 channel receptacle, chain with fastener M28876/15DAW FS3MS000-5 Dust Cap, 31 channel receptacle, without chain M28876/15DEW Consult your FSI sales representative for rope or other Dust Cap options. Termination Kits KTBK-1000 Basic Termination kit including consumables KTUK-1000 Termination upgrade kit for 29504 & 28876 Products Currently in Qualification, Contact FSI Sales.