General Characteristics Item Description: MATERIAL NICKEL COPPER ALLOY
Identification
NSN: 4820-01-121-2887
NIIN: 011212887
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
General Description
The Stop,valve, cataloged under National Stock Number 4820-01-121-2887, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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
4820-01-121-2887
Item Name
Stop,valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Status
ACTIVE
General Characteristics Item Description
MATERIAL NICKEL COPPER ALLOY
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.
4820-01-174-12752641-809-41 ITEM 42POSSIBLE MATCH
ADAPTER,WRENCH,VALVE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4820-01-194-69232641-809-41 ITEM 21POSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4820-01-197-89592641-809-41PC2X2640-801X02PC3POSSIBLE MATCH
PARTS KIT,BALL VALVE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
4820-01-670-8784POSSIBLE MATCH
VALVE,STOP-CHECK
Possible match (shared part number)
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
845-4687566 ITEM 15
5/2Secondary reference
U.S. Government activity
264180941-0046
3/2Design control — primary reference
U.S. Government activity
2641-809-41
D/9Drawing number reference only
U.S. Government activity
845-4687566
D/9Drawing number reference only
U.S. Government activity
Related Parts
4820-01-174-1275POSSIBLE MATCH
ADAPTER,WRENCH,VALVE
2641-809-41 ITEM 42
4820-01-194-6923POSSIBLE MATCH
STEM,FLUID VALVE
2641-809-41 ITEM 21
4820-01-197-8959POSSIBLE MATCH
PARTS KIT,BALL VALVE
2641-809-41PC2X2640-801X02PC3
4820-01-670-8784POSSIBLE MATCH
VALVE,STOP-CHECK
Frequently Asked Questions
What is NSN 4820-01-121-2887?
NSN 4820-01-121-2887 is a Stop,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
What NSN replaces 4820-01-121-2887?
4 possible matches (shared part number, not a government interchangeability claim): 4820-01-174-1275, 4820-01-194-6923, 4820-01-197-8959. Verify interchangeability with system specifications before substitution.
What are the specifications of 4820-01-121-2887?
Key specifications for 4820-01-121-2887: General Characteristics Item Description: MATERIAL NICKEL COPPER ALLOY. 1 specification is documented in the U.S. Government catalog.
Is NSN 4820-01-121-2887 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.