PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

31808Isolator,radio Frequency Reflect

Eaton Corp Information Management Systems Div Microwave Components · NSN 5985-00-008-8243 · FSC 5985 · No Item Name Available
Verified by PartsTable
NSN 5985-00-008-8243 — this item is cataloged by the U.S. Government under National Stock Number 5985-00-008-8243. Primary manufacturer part number: 31808.
Features
  • Isolator,radio Frequency Reflect — FSC 5985
  • Flange Connection Facility Quantity: 4
  • Flange Connecting Hole Diameter: 0.169 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN
  • Document Type: MILITARY SPECIFICATION
  • Flange Type: COVER
  • Identification Designator: TYPE UG-138/U
  • Length: 1.250 INCHES NOMINAL IN
  • 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 5985-00-008-8243, 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 Eaton Corp Information Management Systems Div Microwave Components. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5985-00-008-8243
Primary Part Number31808
Item NameIsolator,radio Frequency Reflect
FSC / FSG5985 / 59 — No Item Name Available
ManufacturerEaton Corp Information Management Systems Div Microwave Components
StatusACTIVE
Flange Connection Facility Quantity4
Flange Connecting Hole Diameter0.169 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN
Document TypeMILITARY SPECIFICATION
Flange TypeCOVER
Identification DesignatorTYPE UG-138/U
Length1.250 INCHES NOMINAL IN
Flange Quantity1
Width0.630 INCHES NOMINAL IN
Flange Connecting Hole SpacingSPACED ON 1.352 IN. BY 1.474 IN. MTG CENTERS IN
Frequency Range Rating+9.0 TO 9.2 GIGAHERTZ
Document IdentificationMIL-F-3922
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5940-00-230-0480 INTERCHANGEABLE
Terminal,lug
5930-01-262-5807 INTERCHANGEABLE
Switch,lock
Cross-Reference Index
Part NumberManufacturer
XLM46 Wv Communications Inc (USA)
31808 PRIMARY Eaton Corp Information Management Systems Div Microwave Components (USA)
XLM46 E and M Laboratories Div of Trak Microwave Corp (USA)
XLM74 E and M Laboratories Div of Trak Microwave Corp (USA)
480274-1 Raytheon Company Div Corp (USA)
480274-1 Raytheon Company Dba Raytheon Co (USA)
Related Parts
5940-00-230-0480INTERCHANGEABLE
TERMINAL,LUG
5930-01-262-5807INTERCHANGEABLE
SWITCH,LOCK

Frequently Asked Questions

What is NSN 5985-00-008-8243?

NSN 5985-00-008-8243 is a Isolator,radio Frequency Reflect, manufactured by Eaton Corp Information Management Systems Div Microwave Components, classified under FSC 5985 (No Item Name Available). Status: active.

What are the part numbers for NSN 5985-00-008-8243?

NSN 5985-00-008-8243 has 6 cross-referenced part numbers: XLM46 (Wv Communications Inc), 31808 (Eaton Corp Information Management Systems Div Microwave Components), XLM46 (E and M Laboratories Div of Trak Microwave Corp), XLM74 (E and M Laboratories Div of Trak Microwave Corp), 480274-1 (Raytheon Company Div Corp) and 1 more.

What NSN replaces 5985-00-008-8243?

There are 2 known substitutes for 5985-00-008-8243: 5940-00-230-0480, 5930-01-262-5807. Verify interchangeability with system specifications before substitution.

What are the specifications of 31808?

Key specifications for 31808: Flange Connection Facility Quantity: 4; Flange Connecting Hole Diameter: 0.169 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN; Document Type: MILITARY SPECIFICATION; Flange Type: COVER. 14 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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