NSN 4820-00-520-9949 · NIIN 005209949 · Part number 10368378
Us Army Aviation and Missile Command · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 18876
Government record, cited
NSN 4820-00-520-9949 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-520-9949. Manufacturer of record part number: 10368378.
General Characteristics Item Description: STAINLESS STEEL;0.562 IN.OD;0.125 IN.THK;BORE TWO STEPS;ONE 0.250 IN.DIA BY 0.062 IN.LG;ONE 9.342 IN.DIA BY 0.062 IN.LG IN
2 manufacturer part numbers on file
Manufacturer of record: Us Army Aviation and Missile Command
Identification
NSN: 4820-00-520-9949
NIIN: 005209949
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 10368378
Manufacturer: Us Army Aviation and Missile Command
General Description
The Plate,diaphragm, cataloged under National Stock Number 4820-00-520-9949, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Us Army Aviation and Missile Command. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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.
Technical Specifications
Parameter
Value
NSN
4820-00-520-9949
Primary Part Number
10368378
Item Name
Plate,diaphragm
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Us Army Aviation and Missile Command
Status
ACTIVE
General Characteristics Item Description
STAINLESS STEEL;0.562 IN.OD;0.125 IN.THK;BORE TWO STEPS;ONE 0.250 IN.DIA BY 0.062 IN.LG;ONE 9.342 IN.DIA BY 0.062 IN.LG IN
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 Items5
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5305-01-006-192221970HPOSSIBLE MATCH
SCREW,SPECIAL
Possible match (shared part number)Textron Lycoming Inc Williamsport Plant
5998-01-096-6579POSSIBLE MATCH
ELECTRONIC COMPONENTS ASSEMBLY
Possible match (shared part number)
5310-01-495-9523219-70POSSIBLE MATCH
NUT,PLAIN,HEXAGON
Possible match (shared part number)Crane Carrier Company, Llc
4730-01-595-5470POSSIBLE MATCH
COUPLING HALF,QUICK DISCONNECT
Possible match (shared part number)
7530-01-626-939321970POSSIBLE MATCH
FILM,POLYESTER
Possible match (shared part number)Flexcon Co, Inc
NSN 4820-00-520-9949 is a Plate,diaphragm, manufactured by Us Army Aviation and Missile Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-00-520-9949?
NSN 4820-00-520-9949 has 2 manufacturer part numbers on file: 10368378 (Us Army Aviation and Missile Command), 21970 (Grove Valve Operations).
What NSN replaces 4820-00-520-9949?
5 possible matches (shared part number, not a government interchangeability claim): 5305-01-006-1922, 5998-01-096-6579, 5310-01-495-9523. Verify interchangeability with system specifications before substitution.
What are the specifications of 10368378?
Key specifications for 10368378: General Characteristics Item Description: STAINLESS STEEL;0.562 IN.OD;0.125 IN.THK;BORE TWO STEPS;ONE 0.250 IN.DIA BY 0.062 IN.LG;ONE 9.342 IN.DIA BY 0.062 IN.LG IN. 1 specification is documented in the U.S. Government catalog.
Is NSN 4820-00-520-9949 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.