FSC: 4330 — Centrifugals, Separators, and Pressure and Vacuum Filters
FSG: 43 — Pumps and Compressors
General Description
The Nitrogen Relief Val, cataloged under National Stock Number 4330-01-488-6491, is classified within Federal Supply Class 4330 (Centrifugals, Separators, and Pressure and Vacuum Filters) of the Pumps and Compressors group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4330-01-488-6491
Item Name
Nitrogen Relief Val
FSC / FSG
4330 / 43 — Centrifugals, Separators, and Pressure and Vacuum Filters
Status
ACTIVE
Criticality Code Justification
AGAV
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
Y
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
B-4CP2-50
3/9Design control — primary reference
Mayhew Industries, Inc.
No interchangeability data on file.
Other items in FSC 4330 — Centrifugals, Separators, and Pressure and Vacuum Filters
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4330-00-000-0145
FILTER ELEMENT,FLUID
4330-00-000-0145
FILTER ELEMENT,FLUID
4330-00-001-1246
4330-00-001-1246 · Item name not on file
4330-00-001-1733
ADAPTER,FLUID FILTER
4330-00-001-2626
FILTER ELEMENT,FLUID
4330-00-001-2700
4330-00-001-2700 · Item name not on file
4330-00-001-3511
4330-00-001-3511 · Item name not on file
4330-00-001-3512
4330-00-001-3512 · Item name not on file
Frequently Asked Questions
What is NSN 4330-01-488-6491?
NSN 4330-01-488-6491 is a Nitrogen Relief Val, classified under FSC 4330, Centrifugals, Separators, and Pressure and Vacuum Filters. Status: active.
What are the specifications of 4330-01-488-6491?
Key specifications for 4330-01-488-6491: Criticality Code Justification: AGAV; Part Name Assigned by Controlling Agency: (INAVY) NITROGEN RELIEF VALVE; End Item Identification: FIGHTER AIRCRAFT F/A-18. 1 specification is documented in the U.S. Government catalog.
Is NSN 4330-01-488-6491 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.