PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

651620-2Waveguide Assembly

Raytheon Company Dba Raytheon · NSN 5985-00-187-7691 · FSC 5985 · No Item Name Available
Verified by PartsTable
NSN 5985-00-187-7691 — this item is cataloged by the U.S. Government under National Stock Number 5985-00-187-7691. Primary manufacturer part number: 651620-2.
Features
  • Waveguide Assembly — FSC 5985
  • Waveguide Inside Width: 2.834 INCHES MINIMUM AND 2.846 INCHES MAXIMUM IN
  • Flange Outside Diameter: 5.310 INCHES NOMINAL SECOND FLANGE IN
  • Flange Outside Diameter: 5.310 INCHES NOMINAL FIRST FLANGE IN
  • Style Designator: STRAIGHT TYPE
  • Flange Style: CHOKE TYPE FIRST FLANGE
  • Flange Connecting Facility and Quantity: 8 UNTHREADED HOLE(S) SECOND FLANGE SINGLE CONNECTION FACILITY
  • Tubing Wall Construction Style: CONVOLUTE SINGLE TUBING SEGMENT
Applications
  • Applications requiring Copper Alloy Single Tubing Segment construction
General Description

The Waveguide Assembly, cataloged under National Stock Number 5985-00-187-7691, 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 Raytheon Company Dba Raytheon. Government technical data includes 27 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 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
NSN5985-00-187-7691
Primary Part Number651620-2
Item NameWaveguide Assembly
FSC / FSG5985 / 59 — No Item Name Available
ManufacturerRaytheon Company Dba Raytheon
StatusACTIVE
Waveguide Inside Width2.834 INCHES MINIMUM AND 2.846 INCHES MAXIMUM IN
Flange Outside Diameter5.310 INCHES NOMINAL SECOND FLANGE IN
Flange Outside Diameter5.310 INCHES NOMINAL FIRST FLANGE IN
Style DesignatorSTRAIGHT TYPE
Flange StyleCHOKE TYPE FIRST FLANGE
Flange Connecting Facility and Quantity8 UNTHREADED HOLE(S) SECOND FLANGE SINGLE CONNECTION FACILITY
Tubing Wall Construction StyleCONVOLUTE SINGLE TUBING SEGMENT
Precious MaterialSILVER
FlexibilityFLEXIBLE SINGLE TUBING SEGMENT
Flange Quantity2
Flange Depth1.250 INCHES NOMINAL FIRST FLANGE IN
Flange Inside Width2.840 INCHES NOMINAL SECOND FLANGE IN
Flange Inside Width2.840 INCHES NOMINAL FIRST FLANGE IN
Waveguide Outside Height1.494 INCHES MINIMUM AND 1.506 INCHES MAXIMUM IN
Precious Material and LocationFLANGE SURFACE SILVER
Flange Inside Height1.340 INCHES NOMINAL FIRST FLANGE IN
Waveguide Outside Width2.994 INCHES MINIMUM AND 3.006 INCHES MAXIMUM IN
MaterialCOPPER ALLOY SINGLE TUBING SEGMENT
Surface TreatmentSILVER ALL FLANGE INSIDE SURFACES
Flange Depth0.750 INCHES NOMINAL SECOND FLANGE IN
Waveguide Inside Height1.334 INCHES MINIMUM AND 1.346 INCHES MAXIMUM IN
Flange Inside Height1.340 INCHES NOMINAL SECOND FLANGE IN
Cross-Sectional Shape StyleINTERNAL, RECTANGULAR EXTERNAL, ROUND
Flange StyleCOVER TYPE SECOND FLANGE
FSC Application DataANTENNAS,WAVEGUIDES,AND RELATED EQUIPMENT
Flange Connecting Facility and Quantity8 THREADED HOLE(S) FIRST FLANGE SINGLE CONNECTION FACILITY
Waveguide Length4.000 FEET NOMINAL FT
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
6645-00-262-7448107X4 INTERCHANGEABLE
Meter,time Totalizing
Jaidinger Manufacturing Co Inc Dba Jaidinger Manufacturing Co Inc
5330-00-634-1396534625 INTERCHANGEABLE
Felt,mechanical,preformed
Sealcraft Corporation
Cross-Reference Index
Part NumberManufacturer
534625 Raytheon Company Dba Raytheon (USA)
220385 Microtech Inc Dba Microtech Inc (USA)
651620-2 Mitec Microwave (CAN)
651620-2 Litton Systems Inc Airtron Div (USA)
651620-2 PRIMARY Raytheon Company Dba Raytheon (USA)
TL-86-4-A-48-N Microwave Engineering Corporation (USA)
0651620-0002 Raytheon Company Dba Raytheon (USA)
Related Parts
6645-00-262-7448INTERCHANGEABLE
METER,TIME TOTALIZING
107X4
5330-00-634-1396INTERCHANGEABLE
FELT,MECHANICAL,PREFORMED
534625

Frequently Asked Questions

What is NSN 5985-00-187-7691?

NSN 5985-00-187-7691 is a Waveguide Assembly, manufactured by Raytheon Company Dba Raytheon, classified under FSC 5985 (No Item Name Available). Status: active.

What are the part numbers for NSN 5985-00-187-7691?

NSN 5985-00-187-7691 has 7 cross-referenced part numbers: 534625 (Raytheon Company Dba Raytheon), 220385 (Microtech Inc Dba Microtech Inc), 651620-2 (Mitec Microwave), 651620-2 (Litton Systems Inc Airtron Div), 651620-2 (Raytheon Company Dba Raytheon) and 2 more.

What NSN replaces 5985-00-187-7691?

There are 2 known substitutes for 5985-00-187-7691: 6645-00-262-7448, 5330-00-634-1396. Verify interchangeability with system specifications before substitution.

What are the specifications of 651620-2?

Key specifications for 651620-2: Waveguide Inside Width: 2.834 INCHES MINIMUM AND 2.846 INCHES MAXIMUM IN; Flange Outside Diameter: 5.310 INCHES NOMINAL SECOND FLANGE IN; Flange Outside Diameter: 5.310 INCHES NOMINAL FIRST FLANGE IN; Style Designator: STRAIGHT TYPE. 28 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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