PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

G300391-1Isolator,radio Frequency Reflect

L3harris Technologies, Inc Div Space & Airborne Systems · NSN 5985-01-327-3017 · FSC 5985 · No Item Name Available
Verified by PartsTable
NSN 5985-01-327-3017 — this item is cataloged by the U.S. Government under National Stock Number 5985-01-327-3017. Primary manufacturer part number: G300391-1.
Features
  • Isolator,radio Frequency Reflect — FSC 5985
  • Flange Type: COVER
  • Flange Connection Facility Quantity: 4
  • Frequency Range Rating: +9.0 TO 9.2 GIGAHERTZ
  • Flange Connecting Hole Diameter: 0.169 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN
  • Identification Designator: TYPE UG-135/U
  • FSC Application Data: ANTENNAS,WAVEGUIDES,AND RELATED EQUIPMENT
  • Flange Quantity: 1
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Isolator,radio Frequency Reflect, cataloged under National Stock Number 5985-01-327-3017, 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 L3harris Technologies, Inc Div Space & Airborne Systems. Government technical data includes 7 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. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5985-01-327-3017
Primary Part NumberG300391-1
Item NameIsolator,radio Frequency Reflect
FSC / FSG5985 / 59 — No Item Name Available
ManufacturerL3harris Technologies, Inc Div Space & Airborne Systems
StatusACTIVE
Flange TypeCOVER
Flange Connection Facility Quantity4
Frequency Range Rating+9.0 TO 9.2 GIGAHERTZ
Flange Connecting Hole Diameter0.169 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN
Identification DesignatorTYPE UG-135/U
FSC Application DataANTENNAS,WAVEGUIDES,AND RELATED EQUIPMENT
Flange Quantity1
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
1035-00-210-2678369688 INTERCHANGEABLE
Valve Assembly
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5306-00-275-4167SKA4026 INTERCHANGEABLE
Bolt,machine
Brunswick Corp Dba Mercury Marine Div Mercury Marine
5910-00-280-7324B14473 INTERCHANGEABLE
Capacitor,fixed,paper Dielectric
Stromberg-Carlson Corp a Plessey Telecommunications Co
2940-00-892-2984140-0495 INTERCHANGEABLE
Filter Element,intake Air Cleane
Cummins Power Generation Inc.
5999-00-952-132504-0302-2371 INTERCHANGEABLE
Shielding Gasket,electronic
Parker-Hannifin Corporation Dba Pneutronics Div Chomerics Division
3110-01-285-683442371 INTERCHANGEABLE
Bearing,ball,annular
May Tool Co
2990-01-313-8792 INTERCHANGEABLE
Pipe,exhaust
Cross-Reference Index
Part NumberManufacturer
X9.11 3dbm Co Inc (USA)
G300391-1 PRIMARY L3harris Technologies, Inc Div Space & Airborne Systems (USA)
XM360 E and M Laboratories Div of Trak Microwave Corp (USA)
4237-1 A and a Engineering Enterprises (USA)
Related Parts
1035-00-210-2678INTERCHANGEABLE
VALVE ASSEMBLY
369688
5306-00-275-4167INTERCHANGEABLE
BOLT,MACHINE
SKA4026
5910-00-280-7324INTERCHANGEABLE
CAPACITOR,FIXED,PAPER DIELECTRIC
B14473
2940-00-892-2984INTERCHANGEABLE
FILTER ELEMENT,INTAKE AIR CLEANE
140-0495
5999-00-952-1325INTERCHANGEABLE
SHIELDING GASKET,ELECTRONIC
04-0302-2371
3110-01-285-6834INTERCHANGEABLE
BEARING,BALL,ANNULAR
42371
2990-01-313-8792INTERCHANGEABLE
PIPE,EXHAUST

Frequently Asked Questions

What is NSN 5985-01-327-3017?

NSN 5985-01-327-3017 is a Isolator,radio Frequency Reflect, manufactured by L3harris Technologies, Inc Div Space & Airborne Systems, classified under FSC 5985 (No Item Name Available). Status: active.

What are the part numbers for NSN 5985-01-327-3017?

NSN 5985-01-327-3017 has 4 cross-referenced part numbers: X9.11 (3dbm Co Inc), G300391-1 (L3harris Technologies, Inc Div Space & Airborne Systems), XM360 (E and M Laboratories Div of Trak Microwave Corp), 4237-1 (A and a Engineering Enterprises).

What NSN replaces 5985-01-327-3017?

There are 7 known substitutes for 5985-01-327-3017: 1035-00-210-2678, 5306-00-275-4167, 5910-00-280-7324 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of G300391-1?

Key specifications for G300391-1: Overall Length: 1.925 INCHES MINIMUM IN; Flange Type: COVER; Flange Connection Facility Quantity: 4; Special Features: VSWR 1.25; INSERTION LOSS 0.50 DB MAX; ISOLATION 18.0 DB MIN; POWER RATING 5.0 W AVG,5000.0 W PEAK; ALUMINUM; CHEMICAL FILM,PRIMER AND PAINT W. 11 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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