PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

113581Waveguide Assembly

Frontgrade Technologies Inc. · NSN 5985-01-283-5611 · FSC 5985 · No Item Name Available
Verified by PartsTable
NSN 5985-01-283-5611 — this item is cataloged by the U.S. Government under National Stock Number 5985-01-283-5611. Primary manufacturer part number: 113581.
Features
  • Waveguide Assembly — FSC 5985
  • 2 verified cross-references
  • Primary manufacturer: Frontgrade Technologies Inc.
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Waveguide Assembly, cataloged under National Stock Number 5985-01-283-5611, 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 Frontgrade Technologies Inc.. This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameWaveguide Assembly
FSC / FSG5985 — No Item Name Available (FSG 59)
ManufacturersFrontgrade Technologies Inc. (CAGE 66544); Litton Systems Inc Airtron Div (CAGE 80006)
Technical Specifications
ParameterValue
NSN5985-01-283-5611
Primary Part Number113581
Item NameWaveguide Assembly
FSC / FSG5985 / 59 — No Item Name Available
ManufacturerFrontgrade Technologies Inc.
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
4820-00-510-9718113581 INTERCHANGEABLE
Seat,valve
Meggitt North Hollywood Inc
5360-00-600-1009112243 INTERCHANGEABLE
Spring,helical,compression
Hydro-Aire Aerospace Corp
5865-01-032-1230021-001064 INTERCHANGEABLE
Heater,contoured Semi-Rigid
Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple
2540-01-111-1846113581 INTERCHANGEABLE
Pad,insulating
Cadillac Gage Textron Inc.
6625-01-394-224711358-1 INTERCHANGEABLE
Test Set,electronic Systems
Hamilton Sundstrand Corporation Dba Collins Aerospace
Cross-Reference Index
Part NumberManufacturer
113581 PRIMARY Frontgrade Technologies Inc. (USA)
113581 Litton Systems Inc Airtron Div (USA)
Related Parts
4820-00-510-9718INTERCHANGEABLE
SEAT,VALVE
113581
5360-00-600-1009INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
112243
5865-01-032-1230INTERCHANGEABLE
HEATER,CONTOURED SEMI-RIGID
021-001064
2540-01-111-1846INTERCHANGEABLE
PAD,INSULATING
113581
6625-01-394-2247INTERCHANGEABLE
TEST SET,ELECTRONIC SYSTEMS
11358-1

Frequently Asked Questions

What is NSN 5985-01-283-5611?

NSN 5985-01-283-5611 is a Waveguide Assembly, manufactured by Frontgrade Technologies Inc., classified under FSC 5985 (No Item Name Available). Status: active.

What are the part numbers for NSN 5985-01-283-5611?

NSN 5985-01-283-5611 has 2 cross-referenced part numbers: 113581 (Frontgrade Technologies Inc.), 113581 (Litton Systems Inc Airtron Div).

What NSN replaces 5985-01-283-5611?

There are 5 known substitutes for 5985-01-283-5611: 4820-00-510-9718, 5360-00-600-1009, 5865-01-032-1230 and 2 more. Verify interchangeability with system specifications before substitution.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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