The Isolator, cataloged under National Stock Number 5340-00-420-2128, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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
Isolator
FSC / FSG
5340 — Hardware, Commercial (FSG 53)
Technical Specifications
Parameter
Value
NSN
5340-00-420-2128
Item Name
Isolator
FSC / FSG
5340 / 53 — Hardware, Commercial
Status
ACTIVE
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
Possible hazard — SDS may be required (DLA HMIC P)
⇄Related Items5
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5995-01-325-1433CA8008POSSIBLE MATCH
CABLE ASSEMBLY,RADIO FREQUENCY
Possible match (shared part number)Frontgrade Technologies Inc.
5305-01-377-6417POSSIBLE MATCH
SCREW,MACHINE
Possible match (shared part number)
5305-01-410-910953-008POSSIBLE MATCH
SCREW,MACHINE
Possible match (shared part number)John G Papailias Co Inc Dba J G Papailias
7025-01-608-071253008POSSIBLE MATCH
DISK DRIVE UNIT
Possible match (shared part number)Verbatim Corp
5945-01-616-189653008POSSIBLE MATCH
SOLENOID,ELECTRICAL
Possible match (shared part number)G.s. Blodgett, Llc Div Blodgett
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
5300-8
3/9Design control — primary reference
U.S. Government activity
Related Parts
5995-01-325-1433POSSIBLE MATCH
CABLE ASSEMBLY,RADIO FREQUENCY
CA8008
5305-01-377-6417POSSIBLE MATCH
SCREW,MACHINE
5305-01-410-9109POSSIBLE MATCH
SCREW,MACHINE
53-008
7025-01-608-0712POSSIBLE MATCH
DISK DRIVE UNIT
53008
5945-01-616-1896POSSIBLE MATCH
SOLENOID,ELECTRICAL
53008
Frequently Asked Questions
What is NSN 5340-00-420-2128?
NSN 5340-00-420-2128 is a Isolator, classified under FSC 5340, Hardware, Commercial. Status: active.
What NSN replaces 5340-00-420-2128?
5 possible matches (shared part number, not a government interchangeability claim): 5995-01-325-1433, 5305-01-377-6417, 5305-01-410-9109. Verify interchangeability with system specifications before substitution.
Is NSN 5340-00-420-2128 hazardous material?
Possible hazard — SDS may be required (DLA HMIC P). 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.