PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

220125Retainer,flybalance

Essex Industries, Inc. Dba Essex Industries · NSN 2990-00-799-0819 · FSC 2990 · No Item Name Available
Verified by PartsTable
NSN 2990-00-799-0819 — this item is cataloged by the U.S. Government under National Stock Number 2990-00-799-0819. Primary manufacturer part number: 220125.
Features
  • Retainer,flybalance — FSC 2990
  • General Characteristics Item Description: STEEL,CASEHARDENED,2.468 IN. OD,0.059 IN. THK,2 HOLES 0.144 IN. DIA SPACED 180 DEG APART ON 2.050 IN. DIA BOLT CIRCLE IN
  • 2 verified cross-references
  • Primary manufacturer: Essex Industries, Inc. Dba Essex Industries
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Retainer,flybalance, cataloged under National Stock Number 2990-00-799-0819, is classified within Federal Supply Class 2990 (No Item Name Available) of the Engine Accessories group. The primary manufacturer of record is Essex Industries, Inc. Dba Essex Industries. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN2990-00-799-0819
Primary Part Number220125
Item NameRetainer,flybalance
FSC / FSG2990 / 29 — No Item Name Available
ManufacturerEssex Industries, Inc. Dba Essex Industries
StatusACTIVE
General Characteristics Item DescriptionSTEEL,CASEHARDENED,2.468 IN. OD,0.059 IN. THK,2 HOLES 0.144 IN. DIA SPACED 180 DEG APART ON 2.050 IN. DIA BOLT CIRCLE IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
5935-00-262-5173 INTERCHANGEABLE
Polarizing Key,electrical Connec
5330-01-132-65333-905 NBR INTERCHANGEABLE
Packing,preformed
Parker-Hannifin Corp Div O-Ring Division
6665-01-288-5520 INTERCHANGEABLE
Regulator,two Stage
7643-01-405-19862201 25 INTERCHANGEABLE
Topographic Geospatial Products
National Geospatial-Intelligence Agency Etds Mailstop J 21
Cross-Reference Index
Part NumberManufacturer
220125 Curtis-Toledo, Inc. (USA)
220125 PRIMARY Essex Industries, Inc. Dba Essex Industries (USA)
Related Parts
5935-00-262-5173INTERCHANGEABLE
POLARIZING KEY,ELECTRICAL CONNEC
5330-01-132-6533INTERCHANGEABLE
PACKING,PREFORMED
3-905 NBR
6665-01-288-5520INTERCHANGEABLE
REGULATOR,TWO STAGE
7643-01-405-1986INTERCHANGEABLE
TOPOGRAPHIC GEOSPATIAL PRODUCTS
2201 25

Frequently Asked Questions

What is NSN 2990-00-799-0819?

NSN 2990-00-799-0819 is a Retainer,flybalance, manufactured by Essex Industries, Inc. Dba Essex Industries, classified under FSC 2990 (No Item Name Available). Status: active.

What are the part numbers for NSN 2990-00-799-0819?

NSN 2990-00-799-0819 has 2 cross-referenced part numbers: 220125 (Curtis-Toledo, Inc.), 220125 (Essex Industries, Inc. Dba Essex Industries).

What NSN replaces 2990-00-799-0819?

There are 4 known substitutes for 2990-00-799-0819: 5935-00-262-5173, 5330-01-132-6533, 6665-01-288-5520 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 220125?

Key specifications for 220125: General Characteristics Item Description: STEEL,CASEHARDENED,2.468 IN. OD,0.059 IN. THK,2 HOLES 0.144 IN. DIA SPACED 180 DEG APART ON 2.050 IN. DIA BOLT CIRCLE IN. 1 total characteristics are documented in the Federal Logistics Information System.

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