PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

740621Ring Assembly

Northrop Grumman Systems Corporation · NSN 6605-00-983-4072 · FSC 6605 · No Item Name Available
Verified by PartsTable
NSN 6605-00-983-4072 — this item is cataloged by the U.S. Government under National Stock Number 6605-00-983-4072. Primary manufacturer part number: 740621.
Features
  • Ring Assembly — FSC 6605
  • 2 verified cross-references
  • Primary manufacturer: Northrop Grumman Systems Corporation
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Ring Assembly, cataloged under National Stock Number 6605-00-983-4072, is classified within Federal Supply Class 6605 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Northrop Grumman Systems Corporation. This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameRing Assembly
FSC / FSG6605 — No Item Name Available (FSG 66)
ManufacturersLockheed Martin Corporation Div Rms - Mitchel Field (CAGE 56232); Northrop Grumman Systems Corporation (CAGE 03956)
Technical Specifications
ParameterValue
NSN6605-00-983-4072
Primary Part Number740621
Item NameRing Assembly
FSC / FSG6605 / 66 — No Item Name Available
ManufacturerNorthrop Grumman Systems Corporation
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5331-00-297-5408740621 INTERCHANGEABLE
O-Ring
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5950-00-829-996874062-1 INTERCHANGEABLE
Transformer
L3harris Technologies, Inc. Div Space and Airborne Systems
Cross-Reference Index
Part NumberManufacturer
740621 Lockheed Martin Corporation Div Rms - Mitchel Field (USA)
740621 PRIMARY Northrop Grumman Systems Corporation (USA)
Related Parts
5331-00-297-5408INTERCHANGEABLE
O-RING
740621
5950-00-829-9968INTERCHANGEABLE
TRANSFORMER
74062-1

Frequently Asked Questions

What is NSN 6605-00-983-4072?

NSN 6605-00-983-4072 is a Ring Assembly, manufactured by Northrop Grumman Systems Corporation, classified under FSC 6605 (No Item Name Available). Status: active.

What are the part numbers for NSN 6605-00-983-4072?

NSN 6605-00-983-4072 has 2 cross-referenced part numbers: 740621 (Lockheed Martin Corporation Div Rms - Mitchel Field), 740621 (Northrop Grumman Systems Corporation).

What NSN replaces 6605-00-983-4072?

There are 2 known substitutes for 6605-00-983-4072: 5331-00-297-5408, 5950-00-829-9968. Verify interchangeability with system specifications before substitution.

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