NSN 4820-01-440-6185 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-440-6185. Manufacturer of record part number: C2020S20.
Operating Pressure: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Thread Direction: RIGHT-HAND ALL ENDS
Nominal Thread Size: 1.625 INCHES ALL ENDS IN
Identification
NSN: 4820-01-440-6185
NIIN: 014406185
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: C2020S20
Manufacturer: Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division
General Description
The Valve,check, cataloged under National Stock Number 4820-01-440-6185, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4820-01-440-6185
Primary Part Number
C2020S20
Item Name
Valve,check
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division
Status
ACTIVE
Connection Style
GASKET SEAL (BOSS) ALL ENDS
Mounting Position
HORIZONTAL OR VERTICAL
Connection Type
THREADED INTERNAL BOSS ALL ENDS
Style Designator
STRAIGHT THRU
Operating Pressure
3000.0 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 4820-01-440-6185?
NSN 4820-01-440-6185 is a Valve,check, manufactured by Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-440-6185?
NSN 4820-01-440-6185 has 2 manufacturer part numbers on file: C2020S20 (Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division), YMD-6923 (Appleton Marine Inc).
What are the specifications of C2020S20?
Key specifications for C2020S20: Connection Style: GASKET SEAL (BOSS) ALL ENDS; Mounting Position: HORIZONTAL OR VERTICAL; Connection Type: THREADED INTERNAL BOSS ALL ENDS; Style Designator: STRAIGHT THRU. 13 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-440-6185 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.