PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

S4420-30Coupler,directional

Telephonics Corp/prd Instruments · NSN 5985-00-137-0915 · FSC 5985 · No Item Name Available
Verified by PartsTable
NSN 5985-00-137-0915 — this item is cataloged by the U.S. Government under National Stock Number 5985-00-137-0915. Primary manufacturer part number: S4420-30.
Features
  • Coupler,directional — FSC 5985
  • Unit Type: TRANSMISSION LINE
  • Power Loss in Decibels: 20.0
  • Terminal Fitting Controlling Agency: JETDS
  • Usage Design: MAIN LINE AND SECONDARY LINE TERMINAL FITTING
  • Radio Frequency Rating: 2.0 GIGAHERTZ MINIMUM AND 4.0 GIGAHERTZ MAXIMUM
  • Design Type: BIDIRECTIONAL
  • Identifying Number: TERMINAL FITTING TYPE N
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Coupler,directional, cataloged under National Stock Number 5985-00-137-0915, 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 Telephonics Corp/prd Instruments. 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. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5985-00-137-0915
Primary Part NumberS4420-30
Item NameCoupler,directional
FSC / FSG5985 / 59 — No Item Name Available
ManufacturerTelephonics Corp/prd Instruments
StatusACTIVE
Unit TypeTRANSMISSION LINE
Power Loss in Decibels20.0
Terminal Fitting Controlling AgencyJETDS
Usage DesignMAIN LINE AND SECONDARY LINE TERMINAL FITTING
Radio Frequency Rating2.0 GIGAHERTZ MINIMUM AND 4.0 GIGAHERTZ MAXIMUM
Design TypeBIDIRECTIONAL
Identifying NumberTERMINAL FITTING TYPE N
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5985-00-450-88023043B-30 INTERCHANGEABLE
Coupler,directional
Narda Holdings, Inc. Dba Narda-Miteq Div Narda-Miteq
Cross-Reference Index
Part NumberManufacturer
S4420-30 Peraton Inc (USA)
S4420-30 PRIMARY Telephonics Corp/prd Instruments (USA)
Related Parts
5985-00-450-8802INTERCHANGEABLE
COUPLER,DIRECTIONAL
3043B-30

Frequently Asked Questions

What is NSN 5985-00-137-0915?

NSN 5985-00-137-0915 is a Coupler,directional, manufactured by Telephonics Corp/prd Instruments, classified under FSC 5985 (No Item Name Available). Status: active.

What are the part numbers for NSN 5985-00-137-0915?

NSN 5985-00-137-0915 has 2 cross-referenced part numbers: S4420-30 (Peraton Inc), S4420-30 (Telephonics Corp/prd Instruments).

What NSN replaces 5985-00-137-0915?

There is 1 known substitute for 5985-00-137-0915: 5985-00-450-8802. Verify interchangeability with system specifications before substitution.

What are the specifications of S4420-30?

Key specifications for S4420-30: Unit Type: TRANSMISSION LINE; Power Loss in Decibels: 20.0; Overall Length: 11.578 INCHES NOMINAL IN; Terminal Fitting Controlling Agency: JETDS. 10 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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