PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

66021-381Coupler,directional

Microlab/fxr Llc · NSN 5985-00-884-7209 · FSC 5985 · No Item Name Available
Verified by PartsTable
NSN 5985-00-884-7209 — this item is cataloged by the U.S. Government under National Stock Number 5985-00-884-7209. Primary manufacturer part number: 66021-381.
Features
  • Coupler,directional — FSC 5985
  • Usage Design: MAIN LINE AND SECONDARY LINE TERMINAL FITTING
  • Design Type: UNIDIRECTIONAL
  • Identifying Number: TERMINAL FITTING TYPE N,FEMALE
  • Terminal Fitting Controlling Agency: MIL
  • Power Loss in Decibels: 3.000
  • Unit Type: TRANSMISSION LINE
  • Radio Frequency Rating: 0.7 GIGAHERTZ MINIMUM AND 1.4 GIGAHERTZ MAXIMUM
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Coupler,directional, cataloged under National Stock Number 5985-00-884-7209, 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 Microlab/fxr Llc. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 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
NSN5985-00-884-7209
Primary Part Number66021-381
Item NameCoupler,directional
FSC / FSG5985 / 59 — No Item Name Available
ManufacturerMicrolab/fxr Llc
StatusACTIVE
Usage DesignMAIN LINE AND SECONDARY LINE TERMINAL FITTING
Design TypeUNIDIRECTIONAL
Identifying NumberTERMINAL FITTING TYPE N,FEMALE
Terminal Fitting Controlling AgencyMIL
Power Loss in Decibels3.000
Unit TypeTRANSMISSION LINE
Radio Frequency Rating0.7 GIGAHERTZ MINIMUM AND 1.4 GIGAHERTZ MAXIMUM
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
7530-00-285-29147530-00-285-2914 INTERCHANGEABLE
Jacket,filing,wallet
National Industries for the Blind
5950-00-357-8645S-1025 INTERCHANGEABLE
Transformer,power
Grand Transformers, Inc Dba Texas Transformer
4820-00-623-8717N442410058 INTERCHANGEABLE
Disk,valve
Leslie Controls, Inc. Dba Leslie Controls Inc
4710-01-009-23264424-1 INTERCHANGEABLE
Tube Assembly,metal
Lockheed Martin Corp
1630-01-596-14274-424-1 INTERCHANGEABLE
Torque Tube,widelug
Goodrich Corporation Div Collins Aerospace, Landing Systems (wheels & Brakes)
3920-01-652-251244241 INTERCHANGEABLE
Cart,general Hauling
Hubert Company, Llc Dba Hubert Co Llc
Cross-Reference Index
Part NumberManufacturer
66021-381 PRIMARY Microlab/fxr Llc (USA)
44241 Northrop Grumman Systems Corp Dba Northrop Grumman Systems Corp (USA)
Related Parts
7530-00-285-2914INTERCHANGEABLE
JACKET,FILING,WALLET
7530-00-285-2914
5950-00-357-8645INTERCHANGEABLE
TRANSFORMER,POWER
S-1025
4820-00-623-8717INTERCHANGEABLE
DISK,VALVE
N442410058
4710-01-009-2326INTERCHANGEABLE
TUBE ASSEMBLY,METAL
4424-1
1630-01-596-1427INTERCHANGEABLE
TORQUE TUBE,WIDELUG
4-424-1
3920-01-652-2512INTERCHANGEABLE
CART,GENERAL HAULING
44241

Frequently Asked Questions

What is NSN 5985-00-884-7209?

NSN 5985-00-884-7209 is a Coupler,directional, manufactured by Microlab/fxr Llc, classified under FSC 5985 (No Item Name Available). Status: active.

What are the part numbers for NSN 5985-00-884-7209?

NSN 5985-00-884-7209 has 2 cross-referenced part numbers: 66021-381 (Microlab/fxr Llc), 44241 (Northrop Grumman Systems Corp Dba Northrop Grumman Systems Corp).

What NSN replaces 5985-00-884-7209?

There are 6 known substitutes for 5985-00-884-7209: 7530-00-285-2914, 5950-00-357-8645, 4820-00-623-8717 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 66021-381?

Key specifications for 66021-381: Usage Design: MAIN LINE AND SECONDARY LINE TERMINAL FITTING; Design Type: UNIDIRECTIONAL; Identifying Number: TERMINAL FITTING TYPE N,FEMALE; Terminal Fitting Controlling Agency: MIL. 10 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com