PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

6RS206Ring,retaining

Popper & Sons, Inc. · NSN 5325-00-200-2550 · FSC 5325 · No Item Name Available
Verified by PartsTable
NSN 5325-00-200-2550 — this item is cataloged by the U.S. Government under National Stock Number 5325-00-200-2550. Primary manufacturer part number: 6RS206.
Features
  • Ring,retaining — FSC 5325
  • Strength Rating: ERR-060
  • Major Thickness: 0.049 INCHES NOMINAL IN
  • Casehardening Indicator: NOT CASEHARDENED
  • Material: STEEL
  • Material: STEEL
  • Material Document and Classification: SAE 1070-1090 ASSN STD SINGLE MATERIAL RESPONSE
  • Material Hardness Rating: 47.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM
Applications
  • Applications requiring Steel construction
General Description

The Ring,retaining, cataloged under National Stock Number 5325-00-200-2550, is classified within Federal Supply Class 5325 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Popper & Sons, Inc.. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 14 commercial cross-references from 8 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5325-00-200-2550
Primary Part Number6RS206
Item NameRing,retaining
FSC / FSG5325 / 53 — No Item Name Available
ManufacturerPopper & Sons, Inc.
StatusCANCELLED
Strength RatingERR-060
Major Thickness0.049 INCHES NOMINAL IN
Casehardening IndicatorNOT CASEHARDENED
MaterialSTEEL
MaterialSTEEL
Material Document and ClassificationSAE 1070-1090 ASSN STD SINGLE MATERIAL RESPONSE
Material Hardness Rating47.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM
Outside Diameter2.227 INCHES NOMINAL IN
Inside Diameter1.971 INCHES NOMINAL IN
Usage DesignEXTERNAL
Ring StyleSPIRAL
Cross-Sectional Shape StyleDOUBLE OVAL
Material Document and ClassificationSAE 1070-1090 ASSN STD SINGLE MATERIAL RESPONSE
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 9
3110-00-155-7341724289-1 INTERCHANGEABLE
Bearing,roller,cylindrical
Lockheed Martin Corporation Div Rms - Mitchel Field
2930-00-172-9502WS206 INTERCHANGEABLE
Parts Kit,engine Water Pump
Trw Inc Trw Intl Trade Government Sales Dept
5930-00-201-44291604781 INTERCHANGEABLE
Adapter,switch Actuator
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5935-00-221-91707100599 INTERCHANGEABLE
Connector,receptacle,electrical
Lockheed Martin Corporation Div Rms
1660-00-947-517719014-1 INTERCHANGEABLE
Parts Kit,controlle
Hamilton Sundstrand Corporation Dba Collins Aerospace
4720-00-957-2617 INTERCHANGEABLE
Hose,nonmetallic
6210-01-298-046119014-1 INTERCHANGEABLE
Lens,light
Fidelity Technologies Corporation
4320-01-299-058819014-1 INTERCHANGEABLE
Impeller,pump,centrifugal
Coffin Turbo Pump Inc
4820-01-441-5613 INTERCHANGEABLE
Repair Kit,hydrauli
Cross-Reference Index
Part NumberManufacturer
6RS206 Popper & Sons, Inc. (USA)
AL773-124 Breeze-Eastern Llc (USA)
RS206 Spirolox Inc (USA)
190141 Woodward, Inc. (USA)
8561-295-37013-38 Woodward, Inc. (USA)
Y1176-2-206 Breeze-Eastern Llc (USA)
A8241-063-82340-250 Woodward, Inc. (USA)
MIL-DTL-27426 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
190141 Woodward, Inc. Div Fuel Systems and Controls (USA)
89015-59 SN2352533 Woodward, Inc. (USA)
5325PL0940472 Jednolity Indeks Materialowy - Uniform Material Index (POL)
M2742610148A Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
37002-40 Woodward, Inc. Div Fuel Systems and Controls (USA)
WS-206 Smalley Steel Ring Co. (USA)
Related Parts
3110-00-155-7341INTERCHANGEABLE
BEARING,ROLLER,CYLINDRICAL
724289-1
2930-00-172-9502INTERCHANGEABLE
PARTS KIT,ENGINE WATER PUMP
WS206
5930-00-201-4429INTERCHANGEABLE
ADAPTER,SWITCH ACTUATOR
1604781
5935-00-221-9170INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
7100599
1660-00-947-5177INTERCHANGEABLE
PARTS KIT,CONTROLLE
19014-1
4720-00-957-2617INTERCHANGEABLE
HOSE,NONMETALLIC
6210-01-298-0461INTERCHANGEABLE
LENS,LIGHT
19014-1
4320-01-299-0588INTERCHANGEABLE
IMPELLER,PUMP,CENTRIFUGAL
19014-1
4820-01-441-5613INTERCHANGEABLE
REPAIR KIT,HYDRAULI

Frequently Asked Questions

What is NSN 5325-00-200-2550?

NSN 5325-00-200-2550 is a Ring,retaining, manufactured by Popper & Sons, Inc., classified under FSC 5325 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5325-00-200-2550?

NSN 5325-00-200-2550 has 14 cross-referenced part numbers: 6RS206 (Popper & Sons, Inc.), AL773-124 (Breeze-Eastern Llc), RS206 (Spirolox Inc), 190141 (Woodward, Inc.), 8561-295-37013-38 (Woodward, Inc.) and 9 more.

What NSN replaces 5325-00-200-2550?

There are 9 known substitutes for 5325-00-200-2550: 3110-00-155-7341, 2930-00-172-9502, 5930-00-201-4429 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 6RS206?

Key specifications for 6RS206: Strength Rating: ERR-060; Major Thickness: 0.049 INCHES NOMINAL IN; Casehardening Indicator: NOT CASEHARDENED; Material: STEEL. 13 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5325-00-200-2550 still in active supply?

NSN 5325-00-200-2550 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com