PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21721Flange Mounting

Parker-Hannifin Corporation Dba Service and Support Operation Div Services and Support Operations · NSN 1680-01-492-4790 · FSC 1680 · No Item Name Available
Verified by PartsTable
NSN 1680-01-492-4790 — this item is cataloged by the U.S. Government under National Stock Number 1680-01-492-4790. Primary manufacturer part number: 21721.
Features
  • Flange Mounting — FSC 1680
  • 1 verified cross-reference
  • Primary manufacturer: Parker-Hannifin Corporation Dba Service and Support Operation Div Services and Support Operations
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Flange Mounting, cataloged under National Stock Number 1680-01-492-4790, is classified within Federal Supply Class 1680 (No Item Name Available) of the Aircraft Components and Accessories group. The primary manufacturer of record is Parker-Hannifin Corporation Dba Service and Support Operation Div Services and Support Operations. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameFlange Mounting
FSC / FSG1680 — No Item Name Available (FSG 16)
ManufacturersParker-Hannifin Corporation Dba Service and Support Operation Div Services and Support Operations (CAGE 59211)
Technical Specifications
ParameterValue
NSN1680-01-492-4790
Primary Part Number21721
Item NameFlange Mounting
FSC / FSG1680 / 16 — No Item Name Available
ManufacturerParker-Hannifin Corporation Dba Service and Support Operation Div Services and Support Operations
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
1650-00-757-5080723228 INTERCHANGEABLE
Plate,seal
Hamilton Sundstrand Corporation
2040-00-841-8823 INTERCHANGEABLE
Parts Kit
1377-00-872-57002172-1 INTERCHANGEABLE
Head Assy,safety
Nammo Defense Systems Inc. Dba Nammo Defense Systems Inc
3455-01-047-428529997 INTERCHANGEABLE
Reamer,machine
Kennametal Inc. Div Kennametal Industrial Products Group
5998-01-074-2503 INTERCHANGEABLE
Circuit Card Assembly
5307-01-229-626121721 INTERCHANGEABLE
Stud,plain
Industrial Technologies and Services Llc
3120-01-266-8500 INTERCHANGEABLE
Bushing,sleeve
2930-01-566-77856038409 INTERCHANGEABLE
Cooler,lubricating Oil,engine
Am General Llc
5930-01-633-487521721 INTERCHANGEABLE
Guard,switch
Willard Marine, Inc.
Cross-Reference Index
Part NumberManufacturer
21721 PRIMARY Parker-Hannifin Corporation Dba Service and Support Operation Div Services and Support Operations (USA)
Related Parts
1650-00-757-5080INTERCHANGEABLE
PLATE,SEAL
723228
2040-00-841-8823INTERCHANGEABLE
PARTS KIT
1377-00-872-5700INTERCHANGEABLE
HEAD ASSY,SAFETY
2172-1
3455-01-047-4285INTERCHANGEABLE
REAMER,MACHINE
29997
5998-01-074-2503INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
5307-01-229-6261INTERCHANGEABLE
STUD,PLAIN
21721
3120-01-266-8500INTERCHANGEABLE
BUSHING,SLEEVE
2930-01-566-7785INTERCHANGEABLE
COOLER,LUBRICATING OIL,ENGINE
6038409
5930-01-633-4875INTERCHANGEABLE
GUARD,SWITCH
21721

Frequently Asked Questions

What is NSN 1680-01-492-4790?

NSN 1680-01-492-4790 is a Flange Mounting, manufactured by Parker-Hannifin Corporation Dba Service and Support Operation Div Services and Support Operations, classified under FSC 1680 (No Item Name Available). Status: active.

What are the part numbers for NSN 1680-01-492-4790?

NSN 1680-01-492-4790 has 1 cross-referenced part number: 21721 (Parker-Hannifin Corporation Dba Service and Support Operation Div Services and Support Operations).

What NSN replaces 1680-01-492-4790?

There are 9 known substitutes for 1680-01-492-4790: 1650-00-757-5080, 2040-00-841-8823, 1377-00-872-5700 and 6 more. Verify interchangeability with system specifications before substitution.

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