NSN 4820-01-394-0591 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-394-0591. Manufacturer of record part number: 6689658.
Also searched as4820-01-394-0591 ·
4820013940591 ·
NIIN 013940591 ·
01-394-0591 ·
FSC 4820 Valves, Nonpowered · CAGE 53711 · 6689658
Connection Type: UNTHREADED INTERNAL PIPE SECOND END
Connection Type: THREADED EXTERNAL PIPE FIRST END
Style Designator: STRAIGHT THRU
Operating Pressure: 4500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Maximum Operating Temp: 28.0 FAHRENHEIT SINGLE RESPONSE DEGF
Media for Which Designed: FUEL/OIL, HYDROCARBON SINGLE RESPONSE
Identification
NSN: 4820-01-394-0591
NIIN: 013940591
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 6689658
Manufacturer: Naval Sea Systems Command
General Description
The Valve,check, cataloged under National Stock Number 4820-01-394-0591, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4820-01-394-0591
Primary Part Number
6689658
Item Name
Valve,check
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Naval Sea Systems Command
Status
ACTIVE
Flow Control Device
DISK
Connection Type
UNTHREADED INTERNAL PIPE SECOND END
Connection Type
THREADED EXTERNAL PIPE FIRST END
Style Designator
STRAIGHT THRU
Operating Pressure
4500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4820-00-000-0097
4820-00-000-0097 · Item name not on file
4820-00-001-0010
VALVE,ROTARY,SELECTOR
4820-00-001-0020
4820-00-001-0020 · Item name not on file
4820-00-001-0021
4820-00-001-0021 · Item name not on file
4820-00-001-0032
4820-00-001-0032 · Item name not on file
4820-00-001-0037
VALVE,SAFETY RELIEF
4820-00-001-0042
4820-00-001-0042 · Item name not on file
4820-00-001-1230
4820-00-001-1230 · Item name not on file
Frequently Asked Questions
What is NSN 4820-01-394-0591?
NSN 4820-01-394-0591 is a Valve,check, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-394-0591?
NSN 4820-01-394-0591 has 1 manufacturer part number on file: 6689658 (Naval Sea Systems Command).
What are the specifications of 6689658?
Key specifications for 6689658: Flow Control Device: DISK; Connection Type: UNTHREADED INTERNAL PIPE SECOND END; Connection Type: THREADED EXTERNAL PIPE FIRST END; Style Designator: STRAIGHT THRU. 9 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-394-0591 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.