Valve, Butterfly4820-01-674-7491

NSN 4820-01-674-7491 · NIIN 016747491 · Part number 4378178

Oshkosh Defense Llc · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 75Q65

Government record, cited

NSN 4820-01-674-7491 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-674-7491. Manufacturer of record part number: 4378178.

Also searched as 4820-01-674-7491 · 4820016747491 · NIIN 016747491 · 01-674-7491 · FSC 4820 Valves, Nonpowered · CAGE 75Q65 · 4378178 · P401131

Nearby stock numbers ← 4820-01-674-7421 Cartridge, Check Valve · 4820-01-674-7515 Valve, Check →

4820-01-674-7491 — Valves, Nonpowered

Features

Valve,butterfly — FSC 4820
Style Designator: STRAIGHT THRU
Valve Size: 4.0 INCHES IN
Material: STEEL OVERALL
Valve Operation Method: MANUAL
2 manufacturer part numbers on file
Manufacturer of record: Oshkosh Defense Llc

Identification

NSN: 4820-01-674-7491
NIIN: 016747491
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 4378178
Manufacturer: Oshkosh Defense Llc

General Description

The Valve,butterfly, cataloged under National Stock Number 4820-01-674-7491, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Oshkosh Defense Llc. Government technical data includes 4 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	4820-01-674-7491
Primary Part Number	4378178
Item Name	Valve,butterfly
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Oshkosh Defense Llc
Status	ACTIVE
Style Designator	STRAIGHT THRU
Valve Size	4.0 INCHES IN
Material	STEEL OVERALL
Valve Operation Method	MANUAL

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
P401131	Magyar Sa (FRA)
4378178 PRIMARY	Oshkosh Defense Llc (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 4820-01-674-7491?

NSN 4820-01-674-7491 is a Valve,butterfly, manufactured by Oshkosh Defense Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-674-7491?

NSN 4820-01-674-7491 has 2 manufacturer part numbers on file: P401131 (Magyar Sa), 4378178 (Oshkosh Defense Llc).

What are the specifications of 4378178?

Key specifications for 4378178: Style Designator: STRAIGHT THRU; Valve Size: 4.0 INCHES IN; Part Name Assigned by Controlling Agency: VALVE BUTTERFLY; Material: STEEL OVERALL. 4 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-674-7491 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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