NSN 4820-01-566-9174 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-566-9174. Manufacturer of record part number: 1066NNS.
Operating Pressure: 500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS
Operating Pressure: 440.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS
Maximum Operating Temp: 100.0 FAHRENHEIT SECOND RESPONSE DEGF
Maximum Operating Temp: 500.0 FAHRENHEIT FIRST RESPONSE DEGF
Material: STEEL COMP 304L BODY
Valve Operation Method: AIR
2 manufacturer part numbers on file
Identification
NSN: 4820-01-566-9174
NIIN: 015669174
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 1066NNS
Manufacturer: Armstrong International Inc Dba Armstrong Machine Works
General Description
The Valve,float, cataloged under National Stock Number 4820-01-566-9174, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Armstrong International Inc Dba Armstrong Machine Works. Government technical data includes 6 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
4820-01-566-9174
Primary Part Number
1066NNS
Item Name
Valve,float
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Armstrong International Inc Dba Armstrong Machine Works
Status
ACTIVE
Operating Pressure
500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS
Operating Pressure
440.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS
Armstrong International Inc Dba Armstrong Machine Works (USA)
No interchangeability data on file.
Other items in FSC 4820 — Valves, Nonpowered
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 4820-01-566-9174?
NSN 4820-01-566-9174 is a Valve,float, manufactured by Armstrong International Inc Dba Armstrong Machine Works, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-566-9174?
NSN 4820-01-566-9174 has 2 manufacturer part numbers on file: C3510-8 (Armstrong International Inc Dba Armstrong Machine Works), 1066NNS (Armstrong International Inc Dba Armstrong Machine Works).
What are the specifications of 1066NNS?
Key specifications for 1066NNS: Operating Pressure: 500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS; Operating Pressure: 440.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS; Maximum Operating Temp: 100.0 FAHRENHEIT SECOND RESPONSE DEGF; Maximum Operating Temp: 500.0 FAHRENHEIT FIRST RESPONSE DEGF. 6 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-566-9174 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.
What is the DEMIL code for NSN 4820-01-566-9174?
NSN 4820-01-566-9174 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.