PartsTable TECHNICAL DATA SHEET

NSN 4820-01-258-4980Government record, cited

Water Jecket Relief4820-01-258-4980

NSN 4820-01-258-4980 · NIIN 012584980 · Part number D-5366 ITEM 8

W B Arnold Company, Inc. · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 2H266

Government record, cited

NSN 4820-01-258-4980 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-258-4980. Manufacturer of record part number: D-5366 ITEM 8.

Also searched as 4820-01-258-4980 · 4820012584980 · NIIN 012584980 · 01-258-4980 · FSC 4820 Valves, Nonpowered · CAGE 2H266 · D-5366 ITEM 8 · 65610404 ITEM 8

Nearby stock numbers ← 4820-01-258-4968 Valve, Gate · 4820-01-258-4988 Seat, Valve →

4820-01-258-4980 — Valves, Nonpowered

Features

Water Jecket Relief — FSC 4820
1 manufacturer part number on file
Manufacturer of record: W B Arnold Company, Inc.

Identification

NSN: 4820-01-258-4980
NIIN: 012584980
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: D-5366 ITEM 8
Manufacturer: W B Arnold Company, Inc.

General Description

The Water Jecket Relief, cataloged under National Stock Number 4820-01-258-4980, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is W B Arnold Company, Inc.. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.

Catalog Facts

Item Name	Water Jecket Relief
FSC / FSG	4820 — Valves, Nonpowered (FSG 48)
Manufacturers	W B Arnold Company, Inc. (CAGE 2H266)

Technical Specifications

Parameter	Value
NSN	4820-01-258-4980
Primary Part Number	D-5366 ITEM 8
Item Name	Water Jecket Relief
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	W B Arnold Company, Inc.
Status	ACTIVE

Lifecycle & Compliance

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

Cross-Reference Index

Part Number	Manufacturer
D-5366 ITEM 8 PRIMARY	W B Arnold Company, Inc. (USA)

Reference documents

Reference	Meaning
D-5366 ITEM 8	5/9 Secondary reference Wartsila Water Systems Limited
65610404 ITEM 8	5/9 Secondary reference Wartsila Water Systems Limited

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 4820-01-258-4980?

NSN 4820-01-258-4980 is a Water Jecket Relief, manufactured by W B Arnold Company, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-258-4980?

NSN 4820-01-258-4980 has 1 manufacturer part number on file: D-5366 ITEM 8 (W B Arnold Company, Inc.).

Is NSN 4820-01-258-4980 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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