PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

S1634Connecting Link,rigid

Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace · NSN 3040-00-590-8491 · FSC 3040 · No Item Name Available
Verified by PartsTable
NSN 3040-00-590-8491 — this item is cataloged by the U.S. Government under National Stock Number 3040-00-590-8491. Primary manufacturer part number: S1634.
Features
  • Connecting Link,rigid — FSC 3040
  • 1 verified cross-reference
  • Primary manufacturer: Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Connecting Link,rigid, cataloged under National Stock Number 3040-00-590-8491, is classified within Federal Supply Class 3040 (No Item Name Available) of the Mechanical Power Transmission Equipment group. The primary manufacturer of record is Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameConnecting Link,rigid
FSC / FSG3040 — No Item Name Available (FSG 30)
ManufacturersSargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace (CAGE 78062)
Technical Specifications
ParameterValue
NSN3040-00-590-8491
Primary Part NumberS1634
Item NameConnecting Link,rigid
FSC / FSG3040 / 30 — No Item Name Available
ManufacturerSargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
4820-01-220-7739S1634 INTERCHANGEABLE
Ring,disk Stem
Crane Co Div Valve Div
Cross-Reference Index
Part NumberManufacturer
S1634 Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace (USA)
Related Parts
4820-01-220-7739INTERCHANGEABLE
RING,DISK STEM
S1634

Frequently Asked Questions

What is NSN 3040-00-590-8491?

NSN 3040-00-590-8491 is a Connecting Link,rigid, manufactured by Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace, classified under FSC 3040 (No Item Name Available). Status: active.

What are the part numbers for NSN 3040-00-590-8491?

NSN 3040-00-590-8491 has 1 cross-referenced part number: S1634 (Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace).

What NSN replaces 3040-00-590-8491?

There is 1 known substitute for 3040-00-590-8491: 4820-01-220-7739. Verify interchangeability with system specifications before substitution.

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