PartsTable TECHNICAL DATA SHEET

NSN 4820-00-778-7295Government record, cited

Stem, Valve4820-00-778-7295

NSN 4820-00-778-7295 · NIIN 007787295 · Part number 904A791-1

Westinghouse Electric Corp · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 79500

Government record, cited

NSN 4820-00-778-7295 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-778-7295. Manufacturer of record part number: 904A791-1.

Also searched as 4820-00-778-7295 · 4820007787295 · NIIN 007787295 · 00-778-7295 · FSC 4820 Valves, Nonpowered · CAGE 79500 · 904A791-1 · 666J925PC27 · 904A791PC1 · 906J314PC27

Nearby stock numbers ← 4820-00-778-7293 Stem, Valve · 4820-00-778-7508 Disk, Valve →

4820-00-778-7295 — Valves, Nonpowered

Features

Stem,valve — FSC 4820
5 manufacturer part numbers on file
Manufacturer of record: Westinghouse Electric Corp

Identification

NSN: 4820-00-778-7295
NIIN: 007787295
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 904A791-1
Manufacturer: Westinghouse Electric Corp

General Description

The Stem,valve, cataloged under National Stock Number 4820-00-778-7295, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Westinghouse Electric Corp. The record lists 5 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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	4820-00-778-7295
Primary Part Number	904A791-1
Item Name	Stem,valve
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Westinghouse Electric Corp
Status	ACTIVE

Lifecycle & Compliance

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

Cross-Reference Index

Part Number	Manufacturer
904A791-1	Westinghouse Electric Corp (USA)
666J925PC27	Westinghouse Electric Corp (USA)
904A791PC1	Westinghouse Electric Corp (USA)
906J314PC27	Westinghouse Electric Corp (USA)
904A491PC1	Westinghouse Electric Corp (USA)

Reference documents

Reference	Meaning
904A791-1	3/9 Design control — primary reference Westinghouse Electric Corp Control Business Unit

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 4820-00-778-7295?

NSN 4820-00-778-7295 is a Stem,valve, manufactured by Westinghouse Electric Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-00-778-7295?

NSN 4820-00-778-7295 has 5 manufacturer part numbers on file: 904A791-1 (Westinghouse Electric Corp), 666J925PC27 (Westinghouse Electric Corp), 904A791PC1 (Westinghouse Electric Corp), 906J314PC27 (Westinghouse Electric Corp), 904A491PC1 (Westinghouse Electric Corp).

What are the specifications of 904A791-1?

Key specifications for 904A791-1: End Item Identification: STEAM TURBINE,SHIPS PROPULSION SYSTEM. 0 specifications are documented in the U.S. Government catalog.

Is NSN 4820-00-778-7295 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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