The Ring,wearing, cataloged under National Stock Number 4320-01-421-0059, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government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.
Catalog Facts
Item Name
Ring,wearing
FSC / FSG
4320 — Power and Hand Pumps (FSG 43)
Technical Specifications
Parameter
Value
NSN
4320-01-421-0059
Item Name
Ring,wearing
FSC / FSG
4320 / 43 — Power and Hand Pumps
Status
ACTIVE
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.
4420-01-421-2097363241-4003 HTPOSSIBLE MATCH
PLATE,COOLING,HEAT EXCHANGER
Possible match (shared part number)Alfa Laval Inc
4420-01-421-2101363141 4003 LTPOSSIBLE MATCH
PLATE,COOLING,HEAT EXCHANGER
Possible match (shared part number)Alfa Laval Inc
4420-01-421-2105363241 4016 IPOSSIBLE MATCH
PLATE,COOLING,HEAT EXCHANGER
Possible match (shared part number)Alfa Laval Inc
4420-01-421-2110363241 4003 IIPOSSIBLE MATCH
PLATE,COOLING,HEAT EXCHANGER
Possible match (shared part number)Alfa Laval Inc
4420-01-421-211432324 7633 2POSSIBLE MATCH
LINER,FLUID COOLER
Possible match (shared part number)Alfa Laval Inc
4420-01-423-31778723958POSSIBLE MATCH
COOLER,FLUID,INDUSTRIAL
Possible match (shared part number)Alfa Laval Inc
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
8723958 ITEM 42
5/9Secondary reference
Alfa Laval Inc
32324 7631 3
3/9Design control — primary reference
Alfa Laval Inc
8723958
D/9Drawing number reference only
Alfa Laval Inc
Related Parts
4420-01-421-2097POSSIBLE MATCH
PLATE,COOLING,HEAT EXCHANGER
363241-4003 HT
4420-01-421-2101POSSIBLE MATCH
PLATE,COOLING,HEAT EXCHANGER
363141 4003 LT
4420-01-421-2105POSSIBLE MATCH
PLATE,COOLING,HEAT EXCHANGER
363241 4016 I
4420-01-421-2110POSSIBLE MATCH
PLATE,COOLING,HEAT EXCHANGER
363241 4003 II
4420-01-421-2114POSSIBLE MATCH
LINER,FLUID COOLER
32324 7633 2
4420-01-423-3177POSSIBLE MATCH
COOLER,FLUID,INDUSTRIAL
8723958
Frequently Asked Questions
What is NSN 4320-01-421-0059?
NSN 4320-01-421-0059 is a Ring,wearing, classified under FSC 4320, Power and Hand Pumps. Status: active.
What NSN replaces 4320-01-421-0059?
6 possible matches (shared part number, not a government interchangeability claim): 4420-01-421-2097, 4420-01-421-2101, 4420-01-421-2105. Verify interchangeability with system specifications before substitution.
Is NSN 4320-01-421-0059 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.