PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21810Ring,retaining

Winchester Interconnect Corporation Dba Winchester Interconnect Div Winchester Interconnect · NSN 5325-00-818-2527 · FSC 5325 · No Item Name Available
Verified by PartsTable
NSN 5325-00-818-2527 — this item is cataloged by the U.S. Government under National Stock Number 5325-00-818-2527. Primary manufacturer part number: 21810.
Features
  • Ring,retaining — FSC 5325
  • 2 verified cross-references
  • Primary manufacturer: Winchester Interconnect Corporation Dba Winchester Interconnect Div Winchester Interconnect
Applications
  • General assembly and fastening
  • Structural repair and reinforcement
  • Facility maintenance hardware
General Description

The Ring,retaining, cataloged under National Stock Number 5325-00-818-2527, is classified within Federal Supply Class 5325 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Winchester Interconnect Corporation Dba Winchester Interconnect Div Winchester Interconnect. This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameRing,retaining
FSC / FSG5325 — No Item Name Available (FSG 53)
ManufacturersWinchester Interconnect Corporation Dba Winchester Interconnect Div Winchester Interconnect (CAGE 81312); Lockheed Martin Corporation Div Rms - Mitchel Field (CAGE 56232)
Technical Specifications
ParameterValue
NSN5325-00-818-2527
Primary Part Number21810
Item NameRing,retaining
FSC / FSG5325 / 53 — No Item Name Available
ManufacturerWinchester Interconnect Corporation Dba Winchester Interconnect Div Winchester Interconnect
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
6685-00-143-4746PT109 INTERCHANGEABLE
Thermometer,self-Indicating
Sigma Products & Mfg
3110-01-007-762621810 INTERCHANGEABLE
Ball,bearing
Mason Electric Co. Dba Mason Controls
5985-01-036-6214218-10 INTERCHANGEABLE
Attenuator,fixed
Cinch Connectivity Solutions Inc
5310-01-049-0471NW21810 INTERCHANGEABLE
Nut,plain,wing
Tld Wollard Llc
5961-01-169-6507 INTERCHANGEABLE
Transistor
5950-01-210-106921810 INTERCHANGEABLE
Reactor
Westerbeke Corporation
4720-01-374-413621810 INTERCHANGEABLE
Hose,preformed
Gates Corporation
5945-01-499-851621-810 INTERCHANGEABLE
Relay,hybrid
Te Connectivity Corporation
Cross-Reference Index
Part NumberManufacturer
21810 PRIMARY Winchester Interconnect Corporation Dba Winchester Interconnect Div Winchester Interconnect (USA)
845936-2 Lockheed Martin Corporation Div Rms - Mitchel Field (USA)
Related Parts
6685-00-143-4746INTERCHANGEABLE
THERMOMETER,SELF-INDICATING
PT109
3110-01-007-7626INTERCHANGEABLE
BALL,BEARING
21810
5985-01-036-6214INTERCHANGEABLE
ATTENUATOR,FIXED
218-10
5310-01-049-0471INTERCHANGEABLE
NUT,PLAIN,WING
NW21810
5961-01-169-6507INTERCHANGEABLE
TRANSISTOR
5950-01-210-1069INTERCHANGEABLE
REACTOR
21810
4720-01-374-4136INTERCHANGEABLE
HOSE,PREFORMED
21810
5945-01-499-8516INTERCHANGEABLE
RELAY,HYBRID
21-810

Frequently Asked Questions

What is NSN 5325-00-818-2527?

NSN 5325-00-818-2527 is a Ring,retaining, manufactured by Winchester Interconnect Corporation Dba Winchester Interconnect Div Winchester Interconnect, classified under FSC 5325 (No Item Name Available). Status: active.

What are the part numbers for NSN 5325-00-818-2527?

NSN 5325-00-818-2527 has 2 cross-referenced part numbers: 21810 (Winchester Interconnect Corporation Dba Winchester Interconnect Div Winchester Interconnect), 845936-2 (Lockheed Martin Corporation Div Rms - Mitchel Field).

What NSN replaces 5325-00-818-2527?

There are 8 known substitutes for 5325-00-818-2527: 6685-00-143-4746, 3110-01-007-7626, 5985-01-036-6214 and 5 more. Verify interchangeability with system specifications before substitution.

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