PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

B90E0002Waveguide Assembly

Mcdonnell Douglas Corp Mcdonnell Douglas Electronic Systems Co · NSN 5985-00-946-6792 · FSC 5985 · No Item Name Available
Verified by PartsTable
NSN 5985-00-946-6792 — this item is cataloged by the U.S. Government under National Stock Number 5985-00-946-6792. Primary manufacturer part number: B90E0002.
Features
  • Waveguide Assembly — FSC 5985
  • Waveguide Outside Height: 0.388 INCHES MINIMUM AND 0.394 INCHES MAXIMUM IN
  • Flange Connecting Facility and Quantity: 4 THREADED HOLE(S) FIRST FLANGE ALL CONNECTION FACILITIES
  • Flange Style: COVER TYPE SECOND FLANGE
  • Flange Outside Height: 1.297 INCHES MINIMUM AND 1.327 INCHES MAXIMUM FIRST FLANGE IN
  • Thread Quantity Per Inch: 32 FIRST FLANGE ALL CONNECTION FACILITIES
  • Waveguide Inside Height: 0.3085 INCHES MINIMUM AND 0.3135 INCHES MAXIMUM IN
  • Waveguide Outside Width: 0.699 INCHES MINIMUM AND 0.705 INCHES MAXIMUM IN
Applications
  • Applications requiring Copper Alloy All Tubing Segment and Flange construction
General Description

The Waveguide Assembly, cataloged under National Stock Number 5985-00-946-6792, 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 Mcdonnell Douglas Corp Mcdonnell Douglas Electronic Systems Co. Government technical data includes 30 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5985-00-946-6792
Primary Part NumberB90E0002
Item NameWaveguide Assembly
FSC / FSG5985 / 59 — No Item Name Available
ManufacturerMcdonnell Douglas Corp Mcdonnell Douglas Electronic Systems Co
StatusACTIVE
Waveguide Outside Height0.388 INCHES MINIMUM AND 0.394 INCHES MAXIMUM IN
Flange Connecting Facility and Quantity4 THREADED HOLE(S) FIRST FLANGE ALL CONNECTION FACILITIES
Flange StyleCOVER TYPE SECOND FLANGE
Flange Outside Height1.297 INCHES MINIMUM AND 1.327 INCHES MAXIMUM FIRST FLANGE IN
Thread Quantity Per Inch32 FIRST FLANGE ALL CONNECTION FACILITIES
Waveguide Inside Height0.3085 INCHES MINIMUM AND 0.3135 INCHES MAXIMUM IN
Waveguide Outside Width0.699 INCHES MINIMUM AND 0.705 INCHES MAXIMUM IN
Flange Inside Width0.705 INCHES MINIMUM SECOND FLANGE IN
Flange Depth0.360 INCHES MINIMUM AND 0.390 INCHES MAXIMUM FIRST FLANGE IN
Thread Class2B FIRST FLANGE ALL CONNECTION FACILITIES
Flange Quantity2
Flange Outside Width1.298 INCHES MINIMUM AND 1.328 INCHES MAXIMUM SECOND FLANGE IN
Flange Inside Height0.394 INCHES MINIMUM SECOND FLANGE IN
Flange Connecting Hole Diameter0.144 INCHES MINIMUM SECOND FLANGE ALL CONNECTION FACILITIES IN
Nominal Thread Size0.138 INCHES FIRST FLANGE SINGLE CONNECTION FACILITY IN
FSC Application DataANTENNAS,WAVEGUIDES,AND RELATED EQUIPMENT
FlexibilityRIGID SINGLE TUBING SEGMENT
Surface TreatmentSILVER SINGLE TUBING SEGMENT INSIDE SURFACES
Precious MaterialSILVER
Surface TreatmentENAMEL AND CHROMATE ZINC ALL TUBING SEGMENT AND FLANGE OUTSIDE SURFACES
MaterialCOPPER ALLOY ALL TUBING SEGMENT AND FLANGE
Flange StyleCHOKE TYPE FIRST FLANGE
Waveguide Offset Distance0.370 INCHES MINIMUM AND 1.430 INCHES MAXIMUM IN
Style DesignatorBEND TYPE
Precious Material and LocationTUBING INSIDE SURFACE SILVER
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) FIRST FLANGE ALL CONNECTION FACILITIES
Waveguide Longer Offset Distance1.970 INCHES MINIMUM AND 2.030 INCHES MAXIMUM IN
Waveguide Inside Width0.6195 INCHES MINIMUM AND 0.6245 INCHES MAXIMUM IN
Flange Connecting Facility and Quantity4 UNTHREADED HOLE(S) SECOND FLANGE ALL CONNECTION FACILITIES
Flange Inside Diameter0.985 INCHES MINIMUM AND 1.015 INCHES MAXIMUM FIRST FLANGE IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
3110-00-155-6446109302 INTERCHANGEABLE
Bearing,ball,annular
Komatsu America Corp.
3120-00-364-686850027 INTERCHANGEABLE
Bearing,sleeve
Sealcraft Corporation
5365-01-619-7790109302 INTERCHANGEABLE
Bushing,machine Thread
Hamilton Jet, Inc.
Cross-Reference Index
Part NumberManufacturer
B90E0002 Mcdonnell Douglas Corp Mcdonnell Douglas Electronic Systems Co (USA)
TRE-57-4-B-L1.4M2.0-90DEGSILVER Microwave Engineering Corporation (USA)
109302 Litton Systems Inc Airtron Div (USA)
Related Parts
3110-00-155-6446INTERCHANGEABLE
BEARING,BALL,ANNULAR
109302
3120-00-364-6868INTERCHANGEABLE
BEARING,SLEEVE
50027
5365-01-619-7790INTERCHANGEABLE
BUSHING,MACHINE THREAD
109302

Frequently Asked Questions

What is NSN 5985-00-946-6792?

NSN 5985-00-946-6792 is a Waveguide Assembly, manufactured by Mcdonnell Douglas Corp Mcdonnell Douglas Electronic Systems Co, classified under FSC 5985 (No Item Name Available). Status: active.

What are the part numbers for NSN 5985-00-946-6792?

NSN 5985-00-946-6792 has 3 cross-referenced part numbers: B90E0002 (Mcdonnell Douglas Corp Mcdonnell Douglas Electronic Systems Co), TRE-57-4-B-L1.4M2.0-90DEGSILVER (Microwave Engineering Corporation), 109302 (Litton Systems Inc Airtron Div).

What NSN replaces 5985-00-946-6792?

There are 3 known substitutes for 5985-00-946-6792: 3110-00-155-6446, 3120-00-364-6868, 5365-01-619-7790. Verify interchangeability with system specifications before substitution.

What are the specifications of B90E0002?

Key specifications for B90E0002: Waveguide Outside Height: 0.388 INCHES MINIMUM AND 0.394 INCHES MAXIMUM IN; Flange Connecting Facility and Quantity: 4 THREADED HOLE(S) FIRST FLANGE ALL CONNECTION FACILITIES; Flange Style: COVER TYPE SECOND FLANGE; Flange Outside Height: 1.297 INCHES MINIMUM AND 1.327 INCHES MAXIMUM FIRST FLANGE IN. 30 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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