PartsTable TECHNICAL DATA SHEET

NSN 4820-01-487-0393Government record, cited

Valve, Safety Relief4820-01-487-0393

NSN 4820-01-487-0393 · NIIN 014870393

FSC 4820 — Valves, Nonpowered · FSG 48 — Valves

Government record, cited

Also searched as 4820-01-487-0393 · 4820014870393 · NIIN 014870393 · 01-487-0393 · FSC 4820 Valves, Nonpowered · SW144B02E0067 · SW144

Nearby stock numbers ← 4820-01-487-0391 Disk, Valve · 4820-01-487-0439 Cock, Drain →

4820-01-487-0393 — Valves, Nonpowered

Features

Valve,safety Relief — FSC 4820
Criticality Code Justification: ZZZY
Reference Number Differentiating Characteristics: MATERIAL WILL BE IN ACCORDANCE WITH NAVICP ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS

Identification

NSN: 4820-01-487-0393
NIIN: 014870393
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves

General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-01-487-0393, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4820-01-487-0393
Item Name	Valve,safety Relief
FSC / FSG	4820 / 48 — Valves, Nonpowered
Status	ACTIVE
Criticality Code Justification	ZZZY
Reference Number Differentiating Characteristics	MATERIAL WILL BE IN ACCORDANCE WITH NAVICP ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS

Lifecycle & Compliance

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

⇄ Related Items 5

Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.

4820-01-488-9732SW14402E0035 POSSIBLE MATCH

VALVE,RELIEF,PRESSURE AND TEMPER

Possible match (shared part number)Emerson Automation Solutions Final Control Us Lp Div Navy Product Team

4820-01-488-9738SW14402E0041 POSSIBLE MATCH

VALVE,RELIEF,PRESSURE AND TEMPER

Possible match (shared part number)Emerson Automation Solutions Final Control Us Lp Div Navy Product Team

4820-01-488-9746SW14402E0046 POSSIBLE MATCH

VALVE,RELIEF,PRESSURE AND TEMPER

Possible match (shared part number)Emerson Automation Solutions Final Control Us Lp Div Navy Product Team

4820-01-629-4656 POSSIBLE MATCH

VALVE,RELIEF,PRESSURE AND TEMPER

Possible match (shared part number)

4820-01-711-0763SW14403E0042 POSSIBLE MATCH

VALVE,SAFETY RELIEF

Possible match (shared part number)Emerson Automation Solutions Final Control Us Lp Div Navy Product Team

Cross-Reference Index

No manufacturer part numbers on file in the U.S. Government catalog.

Reference documents

Reference	Meaning
SW144B02E0067	3/1 Design control — primary reference Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
SW144	5/1 Secondary reference Emerson Automation Solutions Final Control Us Lp Div Navy Product Team

Related Parts

4820-01-488-9732POSSIBLE MATCH

VALVE,RELIEF,PRESSURE AND TEMPER

SW14402E0035

4820-01-488-9738POSSIBLE MATCH

VALVE,RELIEF,PRESSURE AND TEMPER

SW14402E0041

4820-01-488-9746POSSIBLE MATCH

VALVE,RELIEF,PRESSURE AND TEMPER

SW14402E0046

4820-01-629-4656POSSIBLE MATCH

VALVE,RELIEF,PRESSURE AND TEMPER

4820-01-711-0763POSSIBLE MATCH

VALVE,SAFETY RELIEF

SW14403E0042

Frequently Asked Questions

What is NSN 4820-01-487-0393?

NSN 4820-01-487-0393 is a Valve,safety Relief, classified under FSC 4820, Valves, Nonpowered. Status: active.

What NSN replaces 4820-01-487-0393?

5 possible matches (shared part number, not a government interchangeability claim): 4820-01-488-9732, 4820-01-488-9738, 4820-01-488-9746. Verify interchangeability with system specifications before substitution.

What are the specifications of 4820-01-487-0393?

Key specifications for 4820-01-487-0393: Criticality Code Justification: ZZZY; Reference Number Differentiating Characteristics: MATERIAL WILL BE IN ACCORDANCE WITH NAVICP ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS. 2 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-487-0393 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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