PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

511810Ring,retaining

Dynapar Corp Div Specialty Product Technologies · NSN 5325-00-721-7680 · FSC 5325 · No Item Name Available
Verified by PartsTable
NSN 5325-00-721-7680 — this item is cataloged by the U.S. Government under National Stock Number 5325-00-721-7680. Primary manufacturer part number: 511810.
Features
  • Ring,retaining — FSC 5325
  • Inside Diameter: 0.204 INCHES MINIMUM AND 0.208 INCHES MAXIMUM IN
  • Material Document and Classification: FED STD 66,FS 1066 THRU 1090 FED STD SINGLE MATERIAL RESPONSE
  • Surface Treatment: CADMIUM AND CHROMATE
  • Material: STEEL
  • Casehardening Indicator: NOT CASEHARDENED
  • Ring Style: E
  • Usage Design: EXTERNAL
Applications
  • Applications requiring Steel construction
General Description

The Ring,retaining, cataloged under National Stock Number 5325-00-721-7680, is classified within Federal Supply Class 5325 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Dynapar Corp Div Specialty Product Technologies. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 45 commercial cross-references from 26 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5325-00-721-7680
Primary Part Number511810
Item NameRing,retaining
FSC / FSG5325 / 53 — No Item Name Available
ManufacturerDynapar Corp Div Specialty Product Technologies
StatusCANCELLED
Inside Diameter0.204 INCHES MINIMUM AND 0.208 INCHES MAXIMUM IN
Material Document and ClassificationFED STD 66,FS 1066 THRU 1090 FED STD SINGLE MATERIAL RESPONSE
Surface TreatmentCADMIUM AND CHROMATE
MaterialSTEEL
Casehardening IndicatorNOT CASEHARDENED
Ring StyleE
Usage DesignEXTERNAL
Material Hardness Rating66.5 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 71.0 ROCKWELL SUPERFICIAL 30-N MAXIMUM
Cross-Sectional Shape StyleRECTANGULAR
Major Thickness0.023 INCHES MINIMUM AND 0.027 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5305-00-010-0025100025 INTERCHANGEABLE
Screw,cap,hexagon Head
Brinkley Technology Group Llc Dba Hercules Manufacturing
6150-00-071-8225600AS100 INTERCHANGEABLE
Cable Assembly,special Purpose,e
Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier
1650-00-162-6257 INTERCHANGEABLE
Cylinder Assembly,actuating,line
5310-00-169-609579NM-62 INTERCHANGEABLE
Nut,self-Locking,hexagon
Esna, Llc
5365-00-188-8296 INTERCHANGEABLE
Spacer,ring
5325-00-200-52141000-25-ST INTERCHANGEABLE
Ring,retaining
Ametek Inc Div Aerospace and Defense
1630-00-218-8759511810 INTERCHANGEABLE
Pin
Goodyear Tire and Rubber Co the
5305-00-225-3802514425 INTERCHANGEABLE
Setscrew
Honeywell International, Inc Div Aerospace-Tucson
5910-00-237-273910-00025-00 INTERCHANGEABLE
Capacitor,electrica
Compaq Federal Llc
5920-00-270-517916750231-034 INTERCHANGEABLE
Fuse,cartridge
Sypris Electronics, Llc Div Sypris Electronics, Llc - Colorado Field Services
Cross-Reference Index
Part NumberManufacturer
511810 Dynapar Corp Div Specialty Product Technologies (USA)
340-0091-000 Zf Industrieantriebe Witten Gmbh (DEU)
5144-25 Zf Industrieantriebe Witten Gmbh (DEU)
1096-0025 Kidde-Fenwal, Llc (USA)
1-115769 Simpson Electric Company, Inc. (USA)
1000-25-BC Truarc Company Llc Dba Waldes Truarc (USA)
01-115769 Simpson Electric Company, Inc. (USA)
5365009444911 E.c.a Etablissement Centrald'approvisionnement Des Forces Armee
511810-001 Dynapar Corp Div Specialty Product Technologies (USA)
1000-25 Zf Industrieantriebe Witten Gmbh (DEU)
5133-25SMD Zf Industrieantriebe Witten Gmbh (DEU)
511810CAD Dynapar Corp Div Specialty Product Technologies (USA)
5325PL1280238 Jednolity Indeks Materialowy - Uniform Material Index (POL)
MIL-R-21248 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
518B29-8-76REVA Cardwell Condenser Corp Lapointe-Admiral Div (USA)
5133-25PP Truarc Company Llc Dba Waldes Truarc (USA)
MS16633-3025 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
SMC500258-1 Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir (USA)
5133-25MD Truarc Company Llc Dba Waldes Truarc (USA)
MS16633-1025 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5305-00-010-0025INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
100025
6150-00-071-8225INTERCHANGEABLE
CABLE ASSEMBLY,SPECIAL PURPOSE,E
600AS100
1650-00-162-6257INTERCHANGEABLE
CYLINDER ASSEMBLY,ACTUATING,LINE
5310-00-169-6095INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
79NM-62
5365-00-188-8296INTERCHANGEABLE
SPACER,RING
5325-00-200-5214INTERCHANGEABLE
RING,RETAINING
1000-25-ST
1630-00-218-8759INTERCHANGEABLE
PIN
511810
5305-00-225-3802INTERCHANGEABLE
SETSCREW
514425
5910-00-237-2739INTERCHANGEABLE
CAPACITOR,ELECTRICA
10-00025-00
5920-00-270-5179INTERCHANGEABLE
FUSE,CARTRIDGE
16750231-034
5961-00-435-9817INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
3020-00-540-8917INTERCHANGEABLE
GEAR,SPUR
540-8864-002

Frequently Asked Questions

What is NSN 5325-00-721-7680?

NSN 5325-00-721-7680 is a Ring,retaining, manufactured by Dynapar Corp Div Specialty Product Technologies, classified under FSC 5325 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5325-00-721-7680?

NSN 5325-00-721-7680 has 45 cross-referenced part numbers: 511810 (Dynapar Corp Div Specialty Product Technologies), 340-0091-000 (Zf Industrieantriebe Witten Gmbh), 5144-25 (Zf Industrieantriebe Witten Gmbh), 1096-0025 (Kidde-Fenwal, Llc), 1-115769 (Simpson Electric Company, Inc.) and 40 more.

What NSN replaces 5325-00-721-7680?

There are 12 known substitutes for 5325-00-721-7680: 5305-00-010-0025, 6150-00-071-8225, 1650-00-162-6257 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 511810?

Key specifications for 511810: Inside Diameter: 0.204 INCHES MINIMUM AND 0.208 INCHES MAXIMUM IN; Material Document and Classification: FED STD 66,FS 1066 THRU 1090 FED STD SINGLE MATERIAL RESPONSE; Surface Treatment: CADMIUM AND CHROMATE; Material: STEEL. 10 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5325-00-721-7680 still in active supply?

NSN 5325-00-721-7680 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.
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