PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

534900Waveguide Assembly

Instruments and Flight Research, Inc. · NSN 5985-00-971-6998 · FSC 5985 · No Item Name Available
Verified by PartsTable
NSN 5985-00-971-6998 — this item is cataloged by the U.S. Government under National Stock Number 5985-00-971-6998. Primary manufacturer part number: 534900.
Features
  • Waveguide Assembly — FSC 5985
  • Flange Inside Width: 1.003 INCHES NOMINAL SINGLE FLANGE IN
  • Flange Style: COVER TYPE SINGLE FLANGE
  • Flange Outside Width: 1.625 INCHES NOMINAL SINGLE FLANGE IN
  • Flange Outside Height: 1.625 INCHES NOMINAL SINGLE FLANGE IN
  • Flange Inside Height: 0.505 INCHES NOMINAL SINGLE FLANGE IN
  • Waveguide Inside Height: 0.400 INCHES NOMINAL IN
  • Material: COPPER ALLOY SINGLE FLANGE
Applications
  • Applications requiring Copper Alloy Single Flange construction
General Description

The Waveguide Assembly, cataloged under National Stock Number 5985-00-971-6998, 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 Instruments and Flight Research, Inc.. Government technical data includes 16 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. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5985-00-971-6998
Primary Part Number534900
Item NameWaveguide Assembly
FSC / FSG5985 / 59 — No Item Name Available
ManufacturerInstruments and Flight Research, Inc.
StatusACTIVE
Flange Inside Width1.003 INCHES NOMINAL SINGLE FLANGE IN
Flange StyleCOVER TYPE SINGLE FLANGE
Flange Outside Width1.625 INCHES NOMINAL SINGLE FLANGE IN
Flange Outside Height1.625 INCHES NOMINAL SINGLE FLANGE IN
Flange Inside Height0.505 INCHES NOMINAL SINGLE FLANGE IN
Waveguide Inside Height0.400 INCHES NOMINAL IN
MaterialCOPPER ALLOY SINGLE FLANGE
Waveguide Outside Width1.000 INCHES NOMINAL IN
Flange Depth0.438 INCHES NOMINAL SINGLE FLANGE IN
FSC Application DataMULTIAPPLICATION
Waveguide Outside Height0.500 INCHES NOMINAL IN
Waveguide Inside Width0.900 INCHES NOMINAL IN
Waveguide Length4.500 INCHES NOMINAL IN
Style DesignatorSTRAIGHT TYPE
Flange Quantity1
Cross-Sectional Shape StyleINTERNAL, RECTANGULAR EXTERNAL, RECTANGULAR
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
3110-00-100-95452559 INTERCHANGEABLE
Cone and Rollers,tapered Roller
The Timken Corporation
5120-00-196-65922559 INTERCHANGEABLE
Remover,electrical Contact
Winchester Interconnect Corporation Dba Winchester Interconnect Div Winchester Interconnect Rf Corporation
5940-00-262-61762559 INTERCHANGEABLE
Terminal,feedthru
U S Terminals Inc
5975-00-583-29603705-2 INTERCHANGEABLE
Box Connector,electrical
Raco, a Division of Hubbell Incorporated(delaware)
5330-00-651-1867BACG10AH102 INTERCHANGEABLE
Gasket
The Boeing Company Div Defense
5990-00-820-5219534900 INTERCHANGEABLE
Synchro,control Transformer
Honeywell International, Inc Div Aerospace-Tucson
4520-00-864-5123 INTERCHANGEABLE
Heating Element,electrical,nonim
5365-00-975-9778 INTERCHANGEABLE
Bushing
5305-01-081-6114DS-931744 INTERCHANGEABLE
Screw,cap,socket Head
Eaton Aerospace, Llc Dba Jackson South
5970-01-125-2779 INTERCHANGEABLE
Tape,insulation,electrical
Cross-Reference Index
Part NumberManufacturer
2559 Airtec Inc Dba Airtec-Unique (USA)
534900 PRIMARY Instruments and Flight Research, Inc. (USA)
Related Parts
3110-00-100-9545INTERCHANGEABLE
CONE AND ROLLERS,TAPERED ROLLER
2559
5120-00-196-6592INTERCHANGEABLE
REMOVER,ELECTRICAL CONTACT
2559
5940-00-262-6176INTERCHANGEABLE
TERMINAL,FEEDTHRU
2559
5975-00-583-2960INTERCHANGEABLE
BOX CONNECTOR,ELECTRICAL
3705-2
5330-00-651-1867INTERCHANGEABLE
GASKET
BACG10AH102
5990-00-820-5219INTERCHANGEABLE
SYNCHRO,CONTROL TRANSFORMER
534900
4520-00-864-5123INTERCHANGEABLE
HEATING ELEMENT,ELECTRICAL,NONIM
5365-00-975-9778INTERCHANGEABLE
BUSHING
5305-01-081-6114INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
DS-931744
5970-01-125-2779INTERCHANGEABLE
TAPE,INSULATION,ELECTRICAL
6080-01-355-5488INTERCHANGEABLE
INSTALLATION KIT,FIBER OPTIC

Frequently Asked Questions

What is NSN 5985-00-971-6998?

NSN 5985-00-971-6998 is a Waveguide Assembly, manufactured by Instruments and Flight Research, Inc., classified under FSC 5985 (No Item Name Available). Status: active.

What are the part numbers for NSN 5985-00-971-6998?

NSN 5985-00-971-6998 has 2 cross-referenced part numbers: 2559 (Airtec Inc Dba Airtec-Unique), 534900 (Instruments and Flight Research, Inc.).

What NSN replaces 5985-00-971-6998?

There are 11 known substitutes for 5985-00-971-6998: 3110-00-100-9545, 5120-00-196-6592, 5940-00-262-6176 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 534900?

Key specifications for 534900: Flange Inside Width: 1.003 INCHES NOMINAL SINGLE FLANGE IN; Flange Style: COVER TYPE SINGLE FLANGE; Flange Outside Width: 1.625 INCHES NOMINAL SINGLE FLANGE IN; Flange Outside Height: 1.625 INCHES NOMINAL SINGLE FLANGE IN. 16 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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