NSN 4820-01-659-1850 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-659-1850. Manufacturer of record part number: U009M2-AQT 1-1/2".
Maximum Operating Temp and Media for Which Designed: 180.00 FAHRENHEIT WATER DEGF
Operating Pressure and Type: 175.00 POUNDS PER SQUARE INCH (PSI) WATER MAXIMUM REQUIRED LBS
Valve Size: 1.50 INCHES IN
Body Material: COPPER ALLOY
Valve Operation Method: MANUAL
1 manufacturer part number on file
Identification
NSN: 4820-01-659-1850
NIIN: 016591850
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: U009M2-AQT 1-1/2"
Manufacturer: Watts Regulator Company
General Description
The Valve Assembly, cataloged under National Stock Number 4820-01-659-1850, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Watts Regulator Company. Government technical data includes 6 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
4820-01-659-1850
Primary Part Number
U009M2-AQT 1-1/2"
Item Name
Valve Assembly
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Watts Regulator Company
Status
ACTIVE
Valve Quantity
3
Maximum Operating Temp and Media for Which Designed
180.00 FAHRENHEIT WATER DEGF
Operating Pressure and Type
175.00 POUNDS PER SQUARE INCH (PSI) WATER MAXIMUM REQUIRED 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 4820-01-659-1850?
NSN 4820-01-659-1850 is a Valve Assembly, manufactured by Watts Regulator Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-659-1850?
NSN 4820-01-659-1850 has 1 manufacturer part number on file: U009M2-AQT 1-1/2" (Watts Regulator Company).
What are the specifications of U009M2-AQT 1-1/2"?
Key specifications for U009M2-AQT 1-1/2": Valve Quantity: 3; Maximum Operating Temp and Media for Which Designed: 180.00 FAHRENHEIT WATER DEGF; Operating Pressure and Type: 175.00 POUNDS PER SQUARE INCH (PSI) WATER MAXIMUM REQUIRED LBS; Valve Size: 1.50 INCHES IN. 6 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-659-1850 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.