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Product

industrial data rf cable seriesMIL-DTL-24643/65 · Cat.6 250 MHz100 Ω · Watertight Bulkhead LAN4×2×23 AWG · 1000BASE-T / PoE++

LSC6OSW-4 MIL-DTL-24643 LSC6OSW-4 Watertight Shipboard Cat6MIL-DTL-24643/65 · Watertight shipboard Cat6 250 MHz SF/UTP · 100 Ω · Spline · LSZH

US Navy watertight shipboard Category 6 SF/UTP Gigabit LAN cable (LSC6OSW-4) per MIL-DTL-24643/65 (250 MHz) with four 100 Ω 23 AWG pairs, cross-web spline, 35 psi (2.4 bar) water blocking, overall foil + tinned braid, and naval LSZH jacket.

Water-resistant
Approved
Flame-retardant
Low-EMC design
Order designation
M24643/65-01UO (LSC6OSW-4)
Outer Ø ≈
9.65 mm
Wall thickness
1.20 mm
Total weight ≈
118.0 kg/km
Min. bend R (fixed)
77 mm
All sizes (8)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
Impedance
100 Ω ± 15 Ω
1 to 250 MHz Category 6 Class E
Bandwidth
250 MHz Cat.6
1000BASE-T / 2.5G / 5GBASE-T
Watertight
MIL-DTL-24643 W
Longitudinal & radial hydrostatic
Pairs / gauge
4 × 2 × 23 AWG
Solid or 7-strand Cu + spline
Shielding
Foil + Cu braid
100% Al/PET tape + Sn-Cu braid
Outer jacket
LSZH XLPO
Cross-linked polyolefin (-30…+105°C)

Typical values for this cable type, based on MIL-DTL-24643/65 & ANSI/TIA-568 Cat.6 (250 MHz Watertight Shipboard LAN) — confirmed in the datasheet and quotation for your order.

Application fit

Is LSC6OSW-4 right for your machine?

Specify LSC6OSW-4 and LSC6OSWA-4 for high-bandwidth naval combat networks, Aegis/CANES Gigabit backbones, IP radar/sonar video feeds, and PoE++ shipboard switches crossing watertight bulkheads.

Immersion & wet locations

Suitable

Dry water-swellable yarns and tapes around the spline and braid block axial seawater flooding per MIL-DTL-24643/65.

VFD inverter to AC motor screened feeder

Suitable

Central pair spline plus 100 % Al/PET foil and ≥ 85 % tinned copper braid deliver ≥ 44.3 dB NEXT at 100 MHz and high EMC.

Offshore platform & shipboard deck trays

Suitable

Thermoset cross-linked LSZH XLPO jacket withstands +105 °C shipboard ambient, oil, and IEEE 1202 vertical tray flame tests.

Energy chain / drag chain

Not suitable

23 AWG watertight shipboard backbone cable is built for fixed naval cableways and bulkhead transits, not drag chains.

Use SABclean CATLine
Typical machinesUS Navy CANES & Combat System BackbonesSubmarine & Destroyer Watertight BulkheadsShipboard IP Radar, Sonar & EO/IR VideoHigh-Power IEEE 802.3bt PoE++ Ship ConsolesCoast Guard & Allied Frigate Upgrades

Construction

Layer by layer

MIL-DTL-24643/65 watertight Cat.6 build: 4×2×23 AWG pairs around a central cross-web spline with dry water-blocking media, overall Al/PET foil + Sn-Cu braid, and black LSZH XLPO jacket.

12345
Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
123 AWG solid or 7-strand copper conductors4 twisted pairs of 23 AWG annealed bare or tinned copper (≤ 73.2 Ω/km DC resistance)Lower DC loop resistance and lower 250 MHz skin-effect loss than 24 AWG Cat.5e
2Low-loss polyolefin insulation + central splineTIA-568 colour-coded low-loss polyolefin/fluoropolymer pairs separated by a central cross-web splineMaintains pair twist geometry and ≥ 44.3 dB NEXT @ 100 MHz (≥ 38.3 dB @ 250 MHz)
3Water-swellable tape + 100 % Al/PET foil screenDry super-absorbent water-blocking yarns/tape + 100 % coverage aluminum/polyester tapeStops longitudinal seawater migration without increasing dielectric capacitance
4Water-blocked tinned copper wire braid screenASTM B33 tinned copper wire braid (≥ 85 % coverage) + drain wireHigh-frequency shipboard radar and machinery EMI shielding
5Cross-linked low-smoke zero-halogen (LSZH XLPO) sheathThermoset cross-linked polyolefin jacket (black, Ø 9.65 mm; armored Ø 11.30 mm on OSWA)Watertight stuffing-tube compression seal and IEEE 1202 flame compliance

M24643/65-01UO (LSC6OSW-4)

Unarmored watertight 4-pair 23 AWG Cat.6 (250 MHz) shipboard LAN cable (Ø 9.65 mm)

M24643/65-01AU (LSC6OSWA-4)

Braided aluminum wire armored watertight 4-pair 23 AWG Cat.6 shipboard LAN cable (Ø 11.30 mm)

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on MIL-DTL-24643/65 & ANSI/TIA-568 Cat.6 (250 MHz Watertight Shipboard LAN). Values for your order are confirmed in the datasheet and quotation.

Electrical

Characteristic impedance
100 Ω ± 15 Ω (1 to 250 MHz)
Max. conductor DC resistance
≤ 73.2 Ω/km at +20 °C (23 AWG)
Attenuation @ 100 / 250 MHz
19.8 / 32.8 dB/100m max.
NEXT @ 100 / 250 MHz
≥ 44.3 dB / ≥ 38.3 dB
Propagation velocity & skew
70 % nominal VoP · ≤ 45 ns/100m delay skew

Thermal

Operating temperature
-30 °C to +105 °C
Voltage & PoE rating
300 V RMS · IEEE 802.3bt PoE++ Type 4 (90 W)
Smoke & halogen content
MIL-DTL-24643 low-smoke zero-halogen (< 0.2 %)

Mechanical

Pair count & conductor size
4 pairs × 23 AWG + central cross-web spline
Nominal outer diameter
9.65 mm (LSC6OSW-4) · 11.30 mm (LSC6OSWA-4)
Min. bending radius
8 × OD (77 mm unarmored) · 10 × OD (armored)

Resistance

Watertightness test
MIL-DTL-24643 longitudinal hydrostatic water block
Flame propagation
MIL-DTL-24643 / IEEE 1202 vertical tray flame
Marine oil & salt fog
Resists NATO F-76 fuel, lube oil & salt spray

Reference standards

Military specification
MIL-DTL-24643/65 (M24643/65-01UO & -01AU)
LAN channel standard
ANSI/TIA-568.2-D & ISO/IEC 11801 Category 6 Class E
RoHS & REACH
RoHS 3 & REACH SVHC compliant

Identification

Outer jacket colour
Black cross-linked polyolefin (LSZH XLPO)
Surface marking
M24643/65-01UO LSC6OSW-4 WATERTIGHT CAT6 LOW SMOKE
Customs tariff (HS)
8544.49

Sizes

8 standard configurations (LSC6OSW-4)

Engineering dimensions, impedance, propagation velocity, and electrical ratings for LSC6OSW-4 per MIL-DTL-24643/65 & ANSI/TIA-568 Cat.6 (250 MHz Watertight Shipboard LAN).

Dimensions & weights
Order designationImpedance / sizeConductor & dielectricWall ≈
mm		Outer Ø ≈
mm		Metal
kg/km		Weight ≈
kg/km		Min. bend R
fixed mm		Enquiry
Standard LSC6OSW-4 configurations
M24643/65-01UO (LSC6OSW-4)4×2×23 AWG · WatertightSolid 23 AWG + Spline + OS1.209.6545.0118.077
M24643/65-01AU (LSC6OSWA-4)4×2×23 AWG · WT ArmoredSolid 23 AWG + WT + Al Braid1.2011.3068.0165.0113
M24643/65-02UO (LSC6POSW-4)4×2×23 AWG · WT S/FTPPair Foil + Overall Braid WT1.2510.1650.0132.081
M24643/65-02AU (LSC6POSWA-4)4×2×23 AWG · WT S/FTP Arm.Pair Foil + Overall + Al Braid1.2511.8174.0180.0118
M24643/65-03UO (Flex WT)4×2×23/7 AWG · WatertightStranded 23/7 + Spline + OS1.209.9046.0124.079
M24643/65-03AU (Flex WT Arm)4×2×23/7 AWG · WT ArmoredStranded 23/7 WT + Al Braid1.2011.5570.0172.0116
LSC6OS-4 Non-Watertight4×2×23 AWG · Dry Cat.6Non-Watertight Interior Cat.61.008.4043.092.067
LSC6AOSW-4 (500 MHz 10G)4×2×23 AWG · Cat.6A WT10GBASE-T Watertight S/FTP1.2510.4052.0138.083
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • Outer diameters and weights are nominal engineering values for LSC6OSW-4 subject to standard manufacturing tolerances per MIL-DTL-24643/65 & ANSI/TIA-568 Cat.6 (250 MHz Watertight Shipboard LAN).

Quality & approvals

Testing & inspection

Routine tests on every production length, sample and type tests per batch — documented on an EN 10204 3.1 inspection certificate.

  1. ConductorClass 5 stranding
  2. Spark test100 % in-line
  3. Lay-upCores, earth, fillers
  4. SheathingInner, braid / screen, outer
  5. Electrical testsAC voltage, resistance
  6. DimensionsOD, wall thickness
  7. Inspection documents & dispatchDrum & dispatch
Testing & inspectionTest value / referenceFrequency
Routine tests
Characteristic impedance, return loss (VSWR) & TDR sweep100 % frequency-domain return loss and TDR impedance verification per MIL-DTL-24643/65 & ANSI/TIA-568 Cat.6 (250 MHz Watertight Shipboard LAN)Every manufactured length
Dielectric spark & high-voltage withstand test100 % in-line spark and AC/DC dielectric withstand per MIL-DTL-24643/65 & ANSI/TIA-568 Cat.6 (250 MHz Watertight Shipboard LAN)Every spool or drum length
Sample tests
Insertion loss (attenuation), velocity & capacitance checkAttenuation (dB/100m), VoP (%), and capacitance within MIL-DTL-24643/65 & ANSI/TIA-568 Cat.6 (250 MHz Watertight Shipboard LAN) limitsPer production batch
Screening attenuation, transfer impedance & environmental qualificationQualified to MIL-DTL-24643/65 & ANSI/TIA-568 Cat.6 (250 MHz Watertight Shipboard LAN) EMC shielding, thermal, and flame/fluid criteriaType qualification

Inspection certificate

Issued with every drum, listing the routine test results for that length.

Product approvals

MIL-DTL-24643/65 & ANSI/TIA-568 Cat.6 (250 MHz Watertight Shipboard LAN)CE (2014/35/EU) & RoHS 3 (2015/863/EU) CompliantREACH SVHC Compliance Verified

Company certificates

ISO 9001ISO 14001ISO 45001VDE marks approvalUL / cULCE · LVD / EMC

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX M24643/65-01UO LSC6OSW-4 WATERTIGHT CAT6 250MHZ SHIPBOARD LOW SMOKE
Delivery form
Export wooden drums, flange reels or precision coils
Standard lengths
100 m · 305 m · 500 m · 1000 m (or custom cut lengths)
MOQ
100 m (stock sizes) · 300–500 m (custom build)
Lead time
2–4 weeks ex-works
Incoterms
EXW, FOB, CIF, DAP

Technical documents

Downloads

PDFLSC6OSW-4 MIL-DTL-24643 LSC6OSW-4 Watertight Shipboard Cat6 – technical datasheet8 sizes · construction, technical data, approvalsXLSXLSC6OSW-4 spec data (Excel)All 8 sizes with dimensions and data, for your BOM or quotation
Revision
2026-10-20
Updated
2026-10-20

FAQ

Questions engineers ask first

Not covered here? Send your drawing — an engineer replies within 2 business hours.

What advantages does LSC6OSW-4 (MIL-DTL-24643/65) offer over LSC5OSW-4 (/61)?
LSC6OSW-4 upgrades the conductors from 24 AWG to 23 AWG and adds an internal cross-web pair separator spline, doubling the specified RF bandwidth from 100 MHz (Cat.5e) to 250 MHz (Cat.6), improving 100 MHz NEXT by 9 dB (44.3 dB vs 35.3 dB), and lowering DC resistance for 90 W PoE++ devices.
How does the central cross-web spline improve shipboard Cat.6 performance?
The star-shaped polymeric spline physically isolates all four twisted pairs from one another along the entire cable length, preventing pair-to-pair geometry compression when the cable is clamped inside watertight bulkhead stuffing tubes or multi-cable transits.
Is LSC6OSW-4 qualified for longitudinal hydrostatic water blocking?
Yes. Dry super-absorbent swellable yarns and tapes inside the spline channels and under the shield swell on contact with seawater to pass the MIL-DTL-24643 watertightness test without gel contamination.
Can LSC6OSW-4 support 2.5GBASE-T, 5GBASE-T, and 10GBASE-T?
Yes. In addition to 100 m 1000BASE-T, 2.5GBASE-T, and 5GBASE-T channels, its 250 MHz Category 6 performance supports 10GBASE-T over shipboard backbone distances up to 37–55 m.

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LSC6OSW-4 MIL-DTL-24643 LSC6OSW-4 Watertight Shipboard Cat6

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