PartsTable TECHNICAL DATA SHEET

NSN 4820-01-407-6043Government record, cited

Valve, Safety Relief4820-01-407-6043

NSN 4820-01-407-6043 · NIIN 014076043 · Part number 2001559-002

L3harris Technologies, Inc. Dba Harris Div L3harris Technologies Inc Dba Harris Corporation · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 66948

Government record, cited

NSN 4820-01-407-6043 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-407-6043. Manufacturer of record part number: 2001559-002.

Also searched as 4820-01-407-6043 · 4820014076043 · NIIN 014076043 · 01-407-6043 · FSC 4820 Valves, Nonpowered · CAGE 66948 · 2001559-002 · D562B-1M-.75

Nearby stock numbers ← 4820-01-407-6038 Valve, Safety Relief · 4820-01-407-6045 →

4820-01-407-6043 — Valves, Nonpowered

Features

Valve,safety Relief — FSC 4820
Flow Control Device: DISK
Connection Style: PLAIN (PIPE) ALL ENDS
Connection Type: THREADED EXTERNAL PIPE ALL ENDS
Style Designator: STRAIGHT THRU
Operating Pressure: 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Thread Direction: RIGHT-HAND ALL ENDS
Nominal Thread Size: 0.125 INCHES ALL ENDS IN

Identification

NSN: 4820-01-407-6043
NIIN: 014076043
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 2001559-002
Manufacturer: L3harris Technologies, Inc. Dba Harris Div L3harris Technologies Inc Dba Harris Corporation

General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-01-407-6043, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is L3harris Technologies, Inc. Dba Harris Div L3harris Technologies Inc Dba Harris Corporation. Government technical data includes 13 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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	4820-01-407-6043
Primary Part Number	2001559-002
Item Name	Valve,safety Relief
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	L3harris Technologies, Inc. Dba Harris Div L3harris Technologies Inc Dba Harris Corporation
Status	ACTIVE
Flow Control Device	DISK
Connection Style	PLAIN (PIPE) ALL ENDS
Connection Type	THREADED EXTERNAL PIPE ALL ENDS
Style Designator	STRAIGHT THRU
Operating Pressure	150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Thread Direction	RIGHT-HAND ALL ENDS
Nominal Thread Size	0.125 INCHES ALL ENDS IN
Disk Loading Method	SPRING
Media for Which Designed	WATER-OIL-GAS SINGLE RESPONSE
Material	COPPER ALLOY BODY
Thread Series Designator	NPT ALL ENDS
Opening Pressure Setting	0.7 POUNDS PER SQUARE INCH LBS
Valve Operation Method	AUTOMATIC

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
2001559-002	L3harris Technologies, Inc. Dba Harris Div L3harris Technologies Inc Dba Harris Corporation (USA)

Reference documents

Reference	Meaning
D562B-1M-.75	3/2 Design control — primary reference U.S. Government activity

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 4820-01-407-6043?

NSN 4820-01-407-6043 is a Valve,safety Relief, manufactured by L3harris Technologies, Inc. Dba Harris Div L3harris Technologies Inc Dba Harris Corporation, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-407-6043?

NSN 4820-01-407-6043 has 1 manufacturer part number on file: 2001559-002 (L3harris Technologies, Inc. Dba Harris Div L3harris Technologies Inc Dba Harris Corporation).

What are the specifications of 2001559-002?

Key specifications for 2001559-002: Flow Control Device: DISK; Connection Style: PLAIN (PIPE) ALL ENDS; Connection Type: THREADED EXTERNAL PIPE ALL ENDS; Style Designator: STRAIGHT THRU. 13 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-407-6043 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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