The Ring,retaining, cataloged under National Stock Number 5325-01-090-6688, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government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
5325-01-090-6688
Item Name
Ring,retaining
FSC / FSG
5325 / 53 — Fastening Devices
Status
ACTIVE
Usage Design
EXTERNAL OR INTERNAL
End Style
VERTEX CENTER OR ABOVE
Cross-Sectional Shape Style
RECTANGULAR
Outside Diameter
0.055 INCHES NOMINAL IN
Major Thickness
0.010 INCHES NOMINAL IN
Inside Diameter
0.030 INCHES NOMINAL IN
Casehardening Indicator
NOT CASEHARDENED
Ring Style
STRAIGHT GAP
Material
COPPER ALLOY 511
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 Items6
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5935-01-211-2608512228-32POSSIBLE MATCH
POLARIZING KEY,ELECTRICAL CONNEC
Possible match (shared part number)Naval Air Warfare Center Aircraft Division Joint Base Jbmdl
8455-01-590-3328POSSIBLE MATCH
INSIGNIA,SHOULDER SLEEVE
Possible match (shared part number)
8455-01-590-3330POSSIBLE MATCH
INSIGNIA,SHOULDER SLEEVE
Possible match (shared part number)
8455-01-661-5612POSSIBLE MATCH
INSIGNIA,SHOULDER SLEEVE
Possible match (shared part number)
8455-01-725-9649POSSIBLE MATCH
INSIGNIA,SHOULDER SLEEVE
Possible match (shared part number)
8455-01-725-9650POSSIBLE MATCH
INSIGNIA,SHOULDER SLEEVE
Possible match (shared part number)
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
A1803
3/2Design control — primary reference
U.S. Government activity
Related Parts
5935-01-211-2608POSSIBLE MATCH
POLARIZING KEY,ELECTRICAL CONNEC
512228-32
8455-01-590-3328POSSIBLE MATCH
INSIGNIA,SHOULDER SLEEVE
8455-01-590-3330POSSIBLE MATCH
INSIGNIA,SHOULDER SLEEVE
8455-01-661-5612POSSIBLE MATCH
INSIGNIA,SHOULDER SLEEVE
8455-01-725-9649POSSIBLE MATCH
INSIGNIA,SHOULDER SLEEVE
8455-01-725-9650POSSIBLE MATCH
INSIGNIA,SHOULDER SLEEVE
Frequently Asked Questions
What is NSN 5325-01-090-6688?
NSN 5325-01-090-6688 is a Ring,retaining, classified under FSC 5325, Fastening Devices. Status: active.
What NSN replaces 5325-01-090-6688?
6 possible matches (shared part number, not a government interchangeability claim): 5935-01-211-2608, 8455-01-590-3328, 8455-01-590-3330. Verify interchangeability with system specifications before substitution.
What are the specifications of 5325-01-090-6688?
Key specifications for 5325-01-090-6688: Usage Design: EXTERNAL OR INTERNAL; End Style: VERTEX CENTER OR ABOVE; Cross-Sectional Shape Style: RECTANGULAR; Outside Diameter: 0.055 INCHES NOMINAL IN. 9 specifications are documented in the U.S. Government catalog.
Is NSN 5325-01-090-6688 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.