The Ring,retaining, cataloged under National Stock Number 5325-00-981-0185, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. Government technical data includes 8 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 7 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
5325-00-981-0185
Item Name
Ring,retaining
FSC / FSG
5325 / 53 — Fastening Devices
Status
ACTIVE
Usage Design
EXTERNAL
Material Diameter
0.031 INCHES NOMINAL IN
Cross-Sectional Shape Style
ROUND
Outside Diameter
0.250 INCHES NOMINAL IN
Inside Diameter
0.188 INCHES NOMINAL IN
Casehardening Indicator
NOT CASEHARDENED
Ring Style
OFFSET
Material
STEEL
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
⇄Related Items7
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
6630-01-016-9388POSSIBLE MATCH
TITRATOR
Possible match (shared part number)
5935-01-047-5230205718-1POSSIBLE MATCH
BACKSHELL,ELECTRICAL CONNECTOR
Possible match (shared part number)Te Connectivity Corporation
5963-01-122-8260POSSIBLE MATCH
ELECTRONIC MODULE,STANDARDIZED
Possible match (shared part number)
9905-01-247-974150-261POSSIBLE MATCH
PLATE,IDENTIFICATION
Possible match (shared part number)Goodrich Corporation Div Collins Aerospace, Landing Systems (wheels & Brakes)
6695-01-324-64195026-1POSSIBLE MATCH
PANEL,INDICATOR
Possible match (shared part number)Avtechtyee Inc Dba Avtech
5330-01-339-89365026-1POSSIBLE MATCH
RING,WIPER
Possible match (shared part number)Eaton Corporation Dba Jackson Plant
5998-01-352-090950261POSSIBLE MATCH
CIRCUIT CARD ASSEMBLY
Possible match (shared part number)Setra Systems, Inc. Dba Gems Sensors
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
50-261
3/9Design control — primary reference
Telcolab Corp
Related Parts
6630-01-016-9388POSSIBLE MATCH
TITRATOR
5935-01-047-5230POSSIBLE MATCH
BACKSHELL,ELECTRICAL CONNECTOR
205718-1
5963-01-122-8260POSSIBLE MATCH
ELECTRONIC MODULE,STANDARDIZED
9905-01-247-9741POSSIBLE MATCH
PLATE,IDENTIFICATION
50-261
6695-01-324-6419POSSIBLE MATCH
PANEL,INDICATOR
5026-1
5330-01-339-8936POSSIBLE MATCH
RING,WIPER
5026-1
5998-01-352-0909POSSIBLE MATCH
CIRCUIT CARD ASSEMBLY
50261
Frequently Asked Questions
What is NSN 5325-00-981-0185?
NSN 5325-00-981-0185 is a Ring,retaining, classified under FSC 5325, Fastening Devices. Status: active.
What NSN replaces 5325-00-981-0185?
7 possible matches (shared part number, not a government interchangeability claim): 6630-01-016-9388, 5935-01-047-5230, 5963-01-122-8260. Verify interchangeability with system specifications before substitution.
What are the specifications of 5325-00-981-0185?
Key specifications for 5325-00-981-0185: Usage Design: EXTERNAL; Material Diameter: 0.031 INCHES NOMINAL IN; Cross-Sectional Shape Style: ROUND; Outside Diameter: 0.250 INCHES NOMINAL IN. 8 specifications are documented in the U.S. Government catalog.
Is NSN 5325-00-981-0185 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.