PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

C11081-1Coupler,direct Current Blocking

Lockheed Martin Corporation Div Lockheed Martin Aeronautics Company · NSN 5985-01-134-5042 · FSC 5985 · No Item Name Available
Verified by PartsTable
NSN 5985-01-134-5042 — this item is cataloged by the U.S. Government under National Stock Number 5985-01-134-5042. Primary manufacturer part number: C11081-1.
Features
  • Coupler,direct Current Blocking — FSC 5985
  • Capacitor Location: INNER CONDUCTOR
  • Unit Type: COAXIAL LINE
  • Voltage Standing Wave Ratio at Reference Frequency: 1.35 TO 1 AT 0.15 GHZ TO 18 GHZ GHz
  • Terminal Fitting Name: SMA FEMALE COUPLING; SMA MALE COUPLING
  • Radio Frequency Rating: 0.15 GIGAHERTZ MINIMUM AND 18.0 GIGAHERTZ MAXIMUM
  • Voltage Rating: 150.0 VOLTS MAXIMUM
  • Overall Diameter: 0.380 INCHES MAXIMUM IN
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Coupler,direct Current Blocking, cataloged under National Stock Number 5985-01-134-5042, is classified within Federal Supply Class 5985 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Lockheed Martin Corporation Div Lockheed Martin Aeronautics Company. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5985-01-134-5042
Primary Part NumberC11081-1
Item NameCoupler,direct Current Blocking
FSC / FSG5985 / 59 — No Item Name Available
ManufacturerLockheed Martin Corporation Div Lockheed Martin Aeronautics Company
StatusACTIVE
Capacitor LocationINNER CONDUCTOR
Unit TypeCOAXIAL LINE
Voltage Standing Wave Ratio at Reference Frequency1.35 TO 1 AT 0.15 GHZ TO 18 GHZ GHz
Terminal Fitting NameSMA FEMALE COUPLING; SMA MALE COUPLING
Radio Frequency Rating0.15 GIGAHERTZ MINIMUM AND 18.0 GIGAHERTZ MAXIMUM
Voltage Rating150.0 VOLTS MAXIMUM
Overall Diameter0.380 INCHES MAXIMUM IN
Current TypeDC
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
4320-00-450-16214564 INTERCHANGEABLE
Manifold,pump
Eaton Corporation Dba Airframe Div Fuel & Motion Control Systems
2805-00-758-0687946P INTERCHANGEABLE
Piston,internal Combustion Engin
Federal-Mogul Corp Government Sales Dept
5950-00-881-2102RYG9175839 INTERCHANGEABLE
Transformer,power
Raytheon Company
5120-00-999-34884564 INTERCHANGEABLE
Straightening Tool,electrical Co
Marine Depot Maintenance Command Div Marine Corps Logistics Command, Usmc
6540-01-077-54064564 INTERCHANGEABLE
Occluder,eye
Richmond Products Inc
1005-01-443-5098 INTERCHANGEABLE
Barrel,shotgun
Cross-Reference Index
Part NumberManufacturer
C11081-1 PRIMARY Lockheed Martin Corporation Div Lockheed Martin Aeronautics Company (USA)
PF1000C M/a-Com Inc. (USA)
3985C-9 Coaxial Components Corp. Dba Coaxial Components Corp (USA)
4564 Narda Holdings, Inc. Dba Narda-Miteq Div Narda-Miteq (USA)
Related Parts
4320-00-450-1621INTERCHANGEABLE
MANIFOLD,PUMP
4564
2805-00-758-0687INTERCHANGEABLE
PISTON,INTERNAL COMBUSTION ENGIN
946P
5950-00-881-2102INTERCHANGEABLE
TRANSFORMER,POWER
RYG9175839
5120-00-999-3488INTERCHANGEABLE
STRAIGHTENING TOOL,ELECTRICAL CO
4564
6540-01-077-5406INTERCHANGEABLE
OCCLUDER,EYE
4564
1005-01-443-5098INTERCHANGEABLE
BARREL,SHOTGUN

Frequently Asked Questions

What is NSN 5985-01-134-5042?

NSN 5985-01-134-5042 is a Coupler,direct Current Blocking, manufactured by Lockheed Martin Corporation Div Lockheed Martin Aeronautics Company, classified under FSC 5985 (No Item Name Available). Status: active.

What are the part numbers for NSN 5985-01-134-5042?

NSN 5985-01-134-5042 has 4 cross-referenced part numbers: C11081-1 (Lockheed Martin Corporation Div Lockheed Martin Aeronautics Company), PF1000C (M/a-Com Inc.), 3985C-9 (Coaxial Components Corp. Dba Coaxial Components Corp), 4564 (Narda Holdings, Inc. Dba Narda-Miteq Div Narda-Miteq).

What NSN replaces 5985-01-134-5042?

There are 6 known substitutes for 5985-01-134-5042: 4320-00-450-1621, 2805-00-758-0687, 5950-00-881-2102 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of C11081-1?

Key specifications for C11081-1: Capacitor Location: INNER CONDUCTOR; Unit Type: COAXIAL LINE; Voltage Standing Wave Ratio at Reference Frequency: 1.35 TO 1 AT 0.15 GHZ TO 18 GHZ GHz; Terminal Fitting Name: SMA FEMALE COUPLING; SMA MALE COUPLING. 9 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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