PartsTable TECHNICAL DATA SHEET

NSN 4820-01-142-5040Government record, cited

Valve, Safety Relief4820-01-142-5040

NSN 4820-01-142-5040 · NIIN 011425040

FSC 4820 — Valves, Nonpowered · FSG 48 — Valves

Government record, cited

Also searched as 4820-01-142-5040 · 4820011425040 · NIIN 011425040 · 01-142-5040 · FSC 4820 Valves, Nonpowered · S1E10107 · S1E10107 PART V3D10201-01 · V3D10201-01

Nearby stock numbers ← 4820-01-142-5039 Valve, Check · 4820-01-142-5041 Valve, Safety Relief →

4820-01-142-5040 — Valves, Nonpowered

Features

Valve,safety Relief — FSC 4820

Identification

NSN: 4820-01-142-5040
NIIN: 011425040
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves

General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-01-142-5040, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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.

Catalog Facts

Item Name	Valve,safety Relief
FSC / FSG	4820 — Valves, Nonpowered (FSG 48)

Technical Specifications

Parameter	Value
NSN	4820-01-142-5040
Item Name	Valve,safety Relief
FSC / FSG	4820 / 48 — Valves, Nonpowered
Status	ACTIVE

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

⇄ Related Items 5

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

4820-01-143-2904S3D10038-01 POSSIBLE MATCH

PORT ASSEMBLY,VALVE

Possible match (shared part number)Vacco Industries

4820-01-143-4340S1E10107-01 POSSIBLE MATCH

VALVE,REGULATING,FLUID PRESSURE

Possible match (shared part number)Vacco Industries

4820-01-143-5258S1E10107 PART S3D10035-01 POSSIBLE MATCH

INLET PORT,VALVE

Possible match (shared part number)Vacco Industries

4820-01-179-6389S1E10107 ITEM 4 POSSIBLE MATCH

REGULATOR ASSEMBLY

Possible match (shared part number)Vacco Industries

4820-01-233-5501S1E10107 POSSIBLE MATCH

MANIFOLD,PRESSURE,R

Possible match (shared part number)Vacco Industries

Cross-Reference Index

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

Reference documents

Reference	Meaning
S1E10107	D/9 Drawing number reference only U.S. Government activity
S1E10107 PART V3D10201-01	5/2 Secondary reference U.S. Government activity
V3D10201-01	3/2 Design control — primary reference U.S. Government activity

Related Parts

4820-01-143-2904POSSIBLE MATCH

PORT ASSEMBLY,VALVE

S3D10038-01

4820-01-143-4340POSSIBLE MATCH

VALVE,REGULATING,FLUID PRESSURE

S1E10107-01

4820-01-143-5258POSSIBLE MATCH

INLET PORT,VALVE

S1E10107 PART S3D10035-01

4820-01-179-6389POSSIBLE MATCH

REGULATOR ASSEMBLY

S1E10107 ITEM 4

4820-01-233-5501POSSIBLE MATCH

MANIFOLD,PRESSURE,R

S1E10107

Frequently Asked Questions

What is NSN 4820-01-142-5040?

NSN 4820-01-142-5040 is a Valve,safety Relief, classified under FSC 4820, Valves, Nonpowered. Status: active.

What NSN replaces 4820-01-142-5040?

5 possible matches (shared part number, not a government interchangeability claim): 4820-01-143-2904, 4820-01-143-4340, 4820-01-143-5258. Verify interchangeability with system specifications before substitution.

Is NSN 4820-01-142-5040 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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