PartsTable TECHNICAL DATA SHEET

NSN 4820-01-197-8890Government record, cited

Stem, Fluid Valve4820-01-197-8890

NSN 4820-01-197-8890 · NIIN 011978890 · Part number 265-22975 ITEM 2

Moog Inc. Dba Ampac-Isp Corp · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 07270

Government record, cited

NSN 4820-01-197-8890 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-197-8890. Manufacturer of record part number: 265-22975 ITEM 2.

Also searched as 4820-01-197-8890 · 4820011978890 · NIIN 011978890 · 01-197-8890 · FSC 4820 Valves, Nonpowered · CAGE 07270 · 265-22975 ITEM 2 · 265-22975 PIECE 2

Nearby stock numbers ← 4820-01-197-8885 Tailpiece, Valve · 4820-01-197-8891 Parts Kit, Transmitt →

4820-01-197-8890 — Valves, Nonpowered

Features

Stem,fluid Valve — FSC 4820
Valve Type for Which Designed: RELIEF
Valve Model Number for Which Designed: MDL 265D
Material Document and Classification: MIL-B-24059 MIL SPEC SINGLE MATERIAL RESPONSE
Material: COPPER ALLOY
1 manufacturer part number on file
Manufacturer of record: Moog Inc. Dba Ampac-Isp Corp

Identification

NSN: 4820-01-197-8890
NIIN: 011978890
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 265-22975 ITEM 2
Manufacturer: Moog Inc. Dba Ampac-Isp Corp

General Description

The Stem,fluid Valve, cataloged under National Stock Number 4820-01-197-8890, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Moog Inc. Dba Ampac-Isp Corp. Government technical data includes 4 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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	4820-01-197-8890
Primary Part Number	265-22975 ITEM 2
Item Name	Stem,fluid Valve
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Moog Inc. Dba Ampac-Isp Corp
Status	ACTIVE
Valve Type for Which Designed	RELIEF
Valve Model Number for Which Designed	MDL 265D
Material Document and Classification	MIL-B-24059 MIL SPEC SINGLE MATERIAL RESPONSE
Material	COPPER ALLOY

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
265-22975 ITEM 2 PRIMARY	Moog Inc. Dba Ampac-Isp Corp (USA)

Reference documents

Reference	Meaning
265-22975 PIECE 2	5/9 Secondary reference Moog Inc. Dba Ampac-Isp Corp

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 4820-01-197-8890?

NSN 4820-01-197-8890 is a Stem,fluid Valve, manufactured by Moog Inc. Dba Ampac-Isp Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-197-8890?

NSN 4820-01-197-8890 has 1 manufacturer part number on file: 265-22975 ITEM 2 (Moog Inc. Dba Ampac-Isp Corp).

What are the specifications of 265-22975 ITEM 2?

Key specifications for 265-22975 ITEM 2: Valve Type for Which Designed: RELIEF; Valve Model Number for Which Designed: MDL 265D; Material Document and Classification: MIL-B-24059 MIL SPEC SINGLE MATERIAL RESPONSE; Material: COPPER ALLOY. 4 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-197-8890 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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