PartsTable TECHNICAL DATA SHEET

NSN 4820-01-128-4189Government record, cited

Seat, Valve4820-01-128-4189

NSN 4820-01-128-4189 · NIIN 011284189 · Part number 1D22146-1

The Boeing Company · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 18355

Government record, cited

NSN 4820-01-128-4189 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-128-4189. Manufacturer of record part number: 1D22146-1.

Also searched as 4820-01-128-4189 · 4820011284189 · NIIN 011284189 · 01-128-4189 · FSC 4820 Valves, Nonpowered · CAGE 18355 · 1D22146-1 · 10124584

Nearby stock numbers ← 4820-01-128-4159 Valve, Lift-Check · 4820-01-128-4190 Seat, Valve →

4820-01-128-4189 — Valves, Nonpowered

Features

Seat,valve — FSC 4820
Flange Seat to Disk End Height: 0.191 INCHES NOMINAL IN
Flange Diameter: 0.548 INCHES NOMINAL IN
Body Outside Diameter: 0.438 INCHES NOMINAL IN
Body Inside Diameter: 0.144 INCHES NOMINAL IN
Under Flange Height: 0.299 INCHES NOMINAL IN
Material: NICKEL ALLOY K-500 OVERALL
Seat Angle in Deg: 45.000 NOMINAL

Identification

NSN: 4820-01-128-4189
NIIN: 011284189
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 1D22146-1
Manufacturer: The Boeing Company

General Description

The Seat,valve, cataloged under National Stock Number 4820-01-128-4189, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is The Boeing Company. Government technical data includes 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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	4820-01-128-4189
Primary Part Number	1D22146-1
Item Name	Seat,valve
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	The Boeing Company
Status	ACTIVE
Flange Seat to Disk End Height	0.191 INCHES NOMINAL IN
Flange Diameter	0.548 INCHES NOMINAL IN
Body Outside Diameter	0.438 INCHES NOMINAL IN
Body Inside Diameter	0.144 INCHES NOMINAL IN
Under Flange Height	0.299 INCHES NOMINAL IN
Material	NICKEL ALLOY K-500 OVERALL
Seat Angle in Deg	45.000 NOMINAL
Seating Surface Shape	ANGULAR

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL A — No Demilitarization Required
Hazard	No hazard code in the DLA record (HMIC N)
Criticality Code	X

Cross-Reference Index

Part Number	Manufacturer
1D22146-1 PRIMARY	The Boeing Company (USA)

Reference documents

Reference	Meaning
10124584	6/9 Informative reference only Nimikkeistokeskus Ncb Finland

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 4820-01-128-4189?

NSN 4820-01-128-4189 is a Seat,valve, manufactured by The Boeing Company, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-128-4189?

NSN 4820-01-128-4189 has 1 manufacturer part number on file: 1D22146-1 (The Boeing Company).

What are the specifications of 1D22146-1?

Key specifications for 1D22146-1: Flange Seat to Disk End Height: 0.191 INCHES NOMINAL IN; Flange Diameter: 0.548 INCHES NOMINAL IN; Body Outside Diameter: 0.438 INCHES NOMINAL IN; Body Inside Diameter: 0.144 INCHES NOMINAL IN. 8 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-128-4189 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.

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