PartsTable TECHNICAL DATA SHEET

NSN 4820-01-156-7558Government record, cited

Valve, Relief, Pressure and Temper4820-01-156-7558

NSN 4820-01-156-7558 · NIIN 011567558

FSC 4820 — Valves, Nonpowered · FSG 48 — Valves

Government record, cited

Also searched as 4820-01-156-7558 · 4820011567558 · NIIN 011567558 · 01-156-7558 · FSC 4820 Valves, Nonpowered · PRV58E280361 · 280361

Nearby stock numbers ← 4820-01-156-7336 Body, Valve · 4820-01-156-7815 →

4820-01-156-7558 — Valves, Nonpowered

Features

Valve,relief,pressure and Temper — FSC 4820
FSC Application Data: VALVE,RELIEF,2.000

Identification

NSN: 4820-01-156-7558
NIIN: 011567558
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves

General Description

The Valve,relief,pressure and Temper, cataloged under National Stock Number 4820-01-156-7558, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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	4820-01-156-7558
Item Name	Valve,relief,pressure and Temper
FSC / FSG	4820 / 48 — Valves, Nonpowered
Status	ACTIVE
FSC Application Data	VALVE,RELIEF,2.000

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 4

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

4820-01-217-8150182103-0061 POSSIBLE MATCH

STEM,FLUID VALVE

Possible match (shared part number)Marotta Controls Inc

4820-01-217-8236182101-61 POSSIBLE MATCH

DISK,VALVE

Possible match (shared part number)Marotta Controls Inc

5977-01-247-512128036-1 POSSIBLE MATCH

BRUSH,ELECTRICAL CONTACT

Possible match (shared part number)Electro Switch Corp. Dba Electro Switch Corp Div Digitran a Unit of Electro Switch

5977-01-338-010028036-1 POSSIBLE MATCH

BRUSH ASSEMBLY

Possible match (shared part number)Moog Inc.

Cross-Reference Index

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

Reference documents

Reference	Meaning
PRV58E280361	5/9 Secondary reference U.S. Government activity
280361	3/2 Design control — primary reference U.S. Government activity

Related Parts

4820-01-217-8150POSSIBLE MATCH

STEM,FLUID VALVE

182103-0061

4820-01-217-8236POSSIBLE MATCH

DISK,VALVE

182101-61

5977-01-247-5121POSSIBLE MATCH

BRUSH,ELECTRICAL CONTACT

28036-1

5977-01-338-0100POSSIBLE MATCH

BRUSH ASSEMBLY

28036-1

Frequently Asked Questions

What is NSN 4820-01-156-7558?

NSN 4820-01-156-7558 is a Valve,relief,pressure and Temper, classified under FSC 4820, Valves, Nonpowered. Status: active.

What NSN replaces 4820-01-156-7558?

4 possible matches (shared part number, not a government interchangeability claim): 4820-01-217-8150, 4820-01-217-8236, 5977-01-247-5121. Verify interchangeability with system specifications before substitution.

What are the specifications of 4820-01-156-7558?

Key specifications for 4820-01-156-7558: FSC Application Data: VALVE,RELIEF,2.000. 1 specification is documented in the U.S. Government catalog.

Is NSN 4820-01-156-7558 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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