The Valve,throttle, cataloged under National Stock Number 4820-01-489-5557, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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
4820-01-489-5557
Item Name
Valve,throttle
FSC / FSG
4820 / 48 — Valves, Nonpowered
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 Items4
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
3120-01-489-60654D09637-003POSSIBLE MATCH
BUSHING,SLEEVE
Possible match (shared part number)Northrop Grumman Systems Corporation Div Marine Systems
3120-01-489-60714D09637-004POSSIBLE MATCH
BUSHING,SLEEVE
Possible match (shared part number)Northrop Grumman Systems Corporation Div Marine Systems
4820-01-491-01374D09640-002POSSIBLE MATCH
VALVE,THROTTLE
Possible match (shared part number)Northrop Grumman Systems Corporation Div Marine Systems
4820-01-506-26486D59158-003POSSIBLE MATCH
VALVE,THROTTLE
Possible match (shared part number)Northrop Grumman Systems Corporation Div Marine Systems
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
6511E88FN10
5/2Secondary reference
U.S. Government activity
4D09640-001
3/2Design control — primary reference
U.S. Government activity
6511E88
D/9Drawing number reference only
U.S. Government activity
Related Parts
3120-01-489-6065POSSIBLE MATCH
BUSHING,SLEEVE
4D09637-003
3120-01-489-6071POSSIBLE MATCH
BUSHING,SLEEVE
4D09637-004
4820-01-491-0137POSSIBLE MATCH
VALVE,THROTTLE
4D09640-002
4820-01-506-2648POSSIBLE MATCH
VALVE,THROTTLE
6D59158-003
Frequently Asked Questions
What is NSN 4820-01-489-5557?
NSN 4820-01-489-5557 is a Valve,throttle, classified under FSC 4820, Valves, Nonpowered. Status: active.
What NSN replaces 4820-01-489-5557?
4 possible matches (shared part number, not a government interchangeability claim): 3120-01-489-6065, 3120-01-489-6071, 4820-01-491-0137. Verify interchangeability with system specifications before substitution.
What are the specifications of 4820-01-489-5557?
Key specifications for 4820-01-489-5557: Special Features: NHA CAGE 90099 P/N 6511E88-001 THROTTLE CONTROL VALVE ASSEMBLY; Part Name Assigned by Controlling Agency: VALVE 1; End Item Identification: NUCLEAR REACTOR BOUNDRY AREA. 0 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-489-5557 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.