PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

P281BAdapter,waveguide

Keysight Technologies Inc · NSN 5985-00-136-8330 · FSC 5985 · No Item Name Available
Verified by PartsTable
NSN 5985-00-136-8330 — this item is cataloged by the U.S. Government under National Stock Number 5985-00-136-8330. Primary manufacturer part number: P281B.
Features
  • Adapter,waveguide — FSC 5985
  • Tubing Wall Construction Style: SEAMLESS SINGLE TUBING SEGMENT
  • Flange Quantity: 1
  • Flange Connecting Facility and Quantity: 8 UNTHREADED HOLE(S) SINGLE FLANGE SINGLE CONNECTION FACILITY
  • Style Designator: WAVEGUIDE TO COAXIAL
  • Voltage Standing Wave Ratio: 1.25
  • 7 verified cross-references
  • Primary manufacturer: Keysight Technologies Inc
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Adapter,waveguide, cataloged under National Stock Number 5985-00-136-8330, 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 Keysight Technologies Inc. Government technical data includes 5 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 7 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
NSN5985-00-136-8330
Primary Part NumberP281B
Item NameAdapter,waveguide
FSC / FSG5985 / 59 — No Item Name Available
ManufacturerKeysight Technologies Inc
StatusACTIVE
Tubing Wall Construction StyleSEAMLESS SINGLE TUBING SEGMENT
Flange Quantity1
Flange Connecting Facility and Quantity8 UNTHREADED HOLE(S) SINGLE FLANGE SINGLE CONNECTION FACILITY
Style DesignatorWAVEGUIDE TO COAXIAL
Voltage Standing Wave Ratio1.25
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
5820-00-028-9687969 INTERCHANGEABLE
Base,boom
Pfaff and Kendall
5120-00-169-2885969 INTERCHANGEABLE
Wrench,socket
Huntington Partners, Inc. Dba Continental Tool & Mfg.
5930-00-577-006862D24 INTERCHANGEABLE
Switch,toggle
Agilent Technologies, Inc. Div Agilent Technologies Headquarters
5340-00-965-6962 INTERCHANGEABLE
Cup,compression
5999-01-136-1031969 INTERCHANGEABLE
Main Circuit Board
Q V S Inc
5360-01-292-3126000.238.0969 INTERCHANGEABLE
Spring,helical,compression
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
7510-01-335-1746 INTERCHANGEABLE
Tape,pressure Sensitive Adhesive
Cross-Reference Index
Part NumberManufacturer
806351-1 Raytheon Company Dba Raytheon (USA)
P281B PRIMARY Keysight Technologies Inc (USA)
969 Omega Laboratories Inc (USA)
P281B Hewlett-Packard Company Dba HP (USA)
91421644 Thales Sa (FRA)
P-175-APC 3dbm Co Inc Waveguide Group (USA)
P281B Keysight Technologies, Inc. (USA)
Related Parts
5820-00-028-9687INTERCHANGEABLE
BASE,BOOM
969
5120-00-169-2885INTERCHANGEABLE
WRENCH,SOCKET
969
5930-00-577-0068INTERCHANGEABLE
SWITCH,TOGGLE
62D24
5340-00-965-6962INTERCHANGEABLE
CUP,COMPRESSION
5999-01-136-1031INTERCHANGEABLE
MAIN CIRCUIT BOARD
969
5360-01-292-3126INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
000.238.0969
7510-01-335-1746INTERCHANGEABLE
TAPE,PRESSURE SENSITIVE ADHESIVE

Frequently Asked Questions

What is NSN 5985-00-136-8330?

NSN 5985-00-136-8330 is a Adapter,waveguide, manufactured by Keysight Technologies Inc, classified under FSC 5985 (No Item Name Available). Status: active.

What are the part numbers for NSN 5985-00-136-8330?

NSN 5985-00-136-8330 has 7 cross-referenced part numbers: 806351-1 (Raytheon Company Dba Raytheon), P281B (Keysight Technologies Inc), 969 (Omega Laboratories Inc), P281B (Hewlett-Packard Company Dba HP), 91421644 (Thales Sa) and 2 more.

What NSN replaces 5985-00-136-8330?

There are 7 known substitutes for 5985-00-136-8330: 5820-00-028-9687, 5120-00-169-2885, 5930-00-577-0068 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of P281B?

Key specifications for P281B: Tubing Wall Construction Style: SEAMLESS SINGLE TUBING SEGMENT; Flange Quantity: 1; Flange Connecting Facility and Quantity: 8 UNTHREADED HOLE(S) SINGLE FLANGE SINGLE CONNECTION FACILITY; Style Designator: WAVEGUIDE TO COAXIAL. 5 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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