Material Document and Classification: QQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE
Cross-Sectional Shape Style: RECTANGULAR
Outside Diameter: 3.100 INCHES MINIMUM AND 3.115 INCHES MAXIMUM IN
Major Thickness: 0.047 INCHES MINIMUM AND 0.053 INCHES MAXIMUM IN
Inside Diameter: 2.871 INCHES NOMINAL IN
Casehardening Indicator: NOT CASEHARDENED
Identification
NSN: 5325-00-421-5242
NIIN: 004215242
FSC: 5325 — Fastening Devices
FSG: 53 — Hardware and Abrasives
General Description
The Ring,retaining, cataloged under National Stock Number 5325-00-421-5242, 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9 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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
5325-00-421-5242
Item Name
Ring,retaining
FSC / FSG
5325 / 53 — Fastening Devices
Status
ACTIVE
Usage Design
INTERNAL
Material Document and Classification
QQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE
Cross-Sectional Shape Style
RECTANGULAR
Outside Diameter
3.100 INCHES MINIMUM AND 3.115 INCHES MAXIMUM IN
Major Thickness
0.047 INCHES MINIMUM AND 0.053 INCHES MAXIMUM IN
Inside Diameter
2.871 INCHES NOMINAL IN
Casehardening Indicator
NOT CASEHARDENED
Ring Style
ANGULAR CAP
Material
COPPER ALLOY
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 Items4
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5320-00-558-5792NAS1418-05POSSIBLE MATCH
PIN-RIVET
Possible match (shared part number)National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
4730-01-140-191014-185POSSIBLE MATCH
STRAINER ELEMENT,SEDIMENT
Possible match (shared part number)Bedford Precision Parts Corp
4720-01-353-294314185POSSIBLE MATCH
HOSE ASSEMBLY,NONMETALLIC
Possible match (shared part number)Windham Lifts Inc
5950-01-613-155914185POSSIBLE MATCH
TRANSFORMER,POWER
Possible match (shared part number)Emerson Electric Co H and H Precision Products in-Sink-Erator Div
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
14185
3/2Design control — primary reference
U.S. Government activity
Related Parts
5320-00-558-5792POSSIBLE MATCH
PIN-RIVET
NAS1418-05
4730-01-140-1910POSSIBLE MATCH
STRAINER ELEMENT,SEDIMENT
14-185
4720-01-353-2943POSSIBLE MATCH
HOSE ASSEMBLY,NONMETALLIC
14185
5950-01-613-1559POSSIBLE MATCH
TRANSFORMER,POWER
14185
Frequently Asked Questions
What is NSN 5325-00-421-5242?
NSN 5325-00-421-5242 is a Ring,retaining, classified under FSC 5325, Fastening Devices. Status: active.
What NSN replaces 5325-00-421-5242?
4 possible matches (shared part number, not a government interchangeability claim): 5320-00-558-5792, 4730-01-140-1910, 4720-01-353-2943. Verify interchangeability with system specifications before substitution.
What are the specifications of 5325-00-421-5242?
Key specifications for 5325-00-421-5242: Usage Design: INTERNAL; Material Document and Classification: QQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE; Cross-Sectional Shape Style: RECTANGULAR; Outside Diameter: 3.100 INCHES MINIMUM AND 3.115 INCHES MAXIMUM IN. 9 specifications are documented in the U.S. Government catalog.
Is NSN 5325-00-421-5242 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.