The Cap,valve, cataloged under National Stock Number 4820-01-250-6491, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 6 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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
4820-01-250-6491
Item Name
Cap,valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Status
ACTIVE
Valve Type for Which Designed
GATE
Valve Model Number for Which Designed
F05434
Valve Size for Which Designed
4.000 INCHES IN
Height
1.500 INCHES NOMINAL IN
Material
STEEL
Attachment Method
THREADED
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.
4820-01-250-8610F05434 ITEM 5POSSIBLE MATCH
STEM,FLUID VALVE
Possible match (shared part number)Flowserve Corporation Div Flowserve Us Inc
4820-01-250-8628F05434 ITEM 4POSSIBLE MATCH
DISK,VALVE
Possible match (shared part number)Flowserve Corporation Div Flowserve Us Inc
4820-01-251-0636F05434 ITEM 35POSSIBLE MATCH
SLEEVE,VALVE YOKE
Possible match (shared part number)Flowserve Corporation Div Flowserve Us Inc
4820-01-251-6121F05434POSSIBLE MATCH
VALVE,GATE
Possible match (shared part number)Flowserve Corporation Div Flowserve Us Inc
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
F05434 ITEM 3
3/2Design control — primary reference
U.S. Government activity
F05434
D/9Drawing number reference only
U.S. Government activity
Related Parts
4820-01-250-8610POSSIBLE MATCH
STEM,FLUID VALVE
F05434 ITEM 5
4820-01-250-8628POSSIBLE MATCH
DISK,VALVE
F05434 ITEM 4
4820-01-251-0636POSSIBLE MATCH
SLEEVE,VALVE YOKE
F05434 ITEM 35
4820-01-251-6121POSSIBLE MATCH
VALVE,GATE
F05434
Frequently Asked Questions
What is NSN 4820-01-250-6491?
NSN 4820-01-250-6491 is a Cap,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
What NSN replaces 4820-01-250-6491?
4 possible matches (shared part number, not a government interchangeability claim): 4820-01-250-8610, 4820-01-250-8628, 4820-01-251-0636. Verify interchangeability with system specifications before substitution.
What are the specifications of 4820-01-250-6491?
Key specifications for 4820-01-250-6491: Valve Type for Which Designed: GATE; Valve Model Number for Which Designed: F05434; Valve Size for Which Designed: 4.000 INCHES IN; Height: 1.500 INCHES NOMINAL IN. 6 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-250-6491 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.