PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

C721Indicator,hairlined

Ametek Inc Div Aerospace and Defense · NSN 1680-00-569-6693 · FSC 1680 · No Item Name Available
Verified by PartsTable
NSN 1680-00-569-6693 — this item is cataloged by the U.S. Government under National Stock Number 1680-00-569-6693. Primary manufacturer part number: C721.
Features
  • Indicator,hairlined — FSC 1680
  • 1 verified cross-reference
  • Primary manufacturer: Ametek Inc Div Aerospace and Defense
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Indicator,hairlined, cataloged under National Stock Number 1680-00-569-6693, is classified within Federal Supply Class 1680 (No Item Name Available) of the Aircraft Components and Accessories group. The primary manufacturer of record is Ametek Inc Div Aerospace and Defense. This item has 1 commercial cross-reference from 1 manufacturer, 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 NameIndicator,hairlined
FSC / FSG1680 — No Item Name Available (FSG 16)
ManufacturersAmetek Inc Div Aerospace and Defense (CAGE 97424)
Technical Specifications
ParameterValue
NSN1680-00-569-6693
Primary Part NumberC721
Item NameIndicator,hairlined
FSC / FSG1680 / 16 — No Item Name Available
ManufacturerAmetek Inc Div Aerospace and Defense
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
4820-00-383-4531 INTERCHANGEABLE
Seat,valve
2520-01-092-9227C721 INTERCHANGEABLE
Cone Assembly,clutc
Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic
Cross-Reference Index
Part NumberManufacturer
C721 PRIMARY Ametek Inc Div Aerospace and Defense (USA)
Related Parts
4820-00-383-4531INTERCHANGEABLE
SEAT,VALVE
2520-01-092-9227INTERCHANGEABLE
CONE ASSEMBLY,CLUTC
C721

Frequently Asked Questions

What is NSN 1680-00-569-6693?

NSN 1680-00-569-6693 is a Indicator,hairlined, manufactured by Ametek Inc Div Aerospace and Defense, classified under FSC 1680 (No Item Name Available). Status: active.

What are the part numbers for NSN 1680-00-569-6693?

NSN 1680-00-569-6693 has 1 cross-referenced part number: C721 (Ametek Inc Div Aerospace and Defense).

What NSN replaces 1680-00-569-6693?

There are 2 known substitutes for 1680-00-569-6693: 4820-00-383-4531, 2520-01-092-9227. Verify interchangeability with system specifications before substitution.

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