NSN 4820-01-391-0858 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-391-0858. Manufacturer of record part number: T433Y1 1-2IN.
Also searched as4820-01-391-0858 ·
4820013910858 ·
NIIN 013910858 ·
01-391-0858 ·
FSC 4820 Valves, Nonpowered · CAGE 61623 · T433Y1 1-2IN · T433Y1 1-2 IN
Operating Pressure: 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Maximum Operating Temp: 406.0 FAHRENHEIT SINGLE RESPONSE DEGF
Media for Which Designed: STEAM SINGLE RESPONSE
Material: COPPER ALLOY BODY
1 manufacturer part number on file
Identification
NSN: 4820-01-391-0858
NIIN: 013910858
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: T433Y1 1-2IN
Manufacturer: Nibco Inc Chemtrol Div
General Description
The Valve,check, cataloged under National Stock Number 4820-01-391-0858, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Nibco Inc Chemtrol Div. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4820-01-391-0858
Primary Part Number
T433Y1 1-2IN
Item Name
Valve,check
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Nibco Inc Chemtrol Div
Status
ACTIVE
Flow Control Device
DISK
Style Designator
STRAIGHT THRU
Operating Pressure
150.0 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 4820-01-391-0858?
NSN 4820-01-391-0858 is a Valve,check, manufactured by Nibco Inc Chemtrol Div, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-391-0858?
NSN 4820-01-391-0858 has 1 manufacturer part number on file: T433Y1 1-2IN (Nibco Inc Chemtrol Div).
What are the specifications of T433Y1 1-2IN?
Key specifications for T433Y1 1-2IN: Flow Control Device: DISK; Style Designator: STRAIGHT THRU; Operating Pressure: 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Maximum Operating Temp: 406.0 FAHRENHEIT SINGLE RESPONSE DEGF. 6 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-391-0858 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.