PartsTable TECHNICAL DATA SHEET

NSN 4820-01-311-9463Government record, cited

Valve, Safety Relief4820-01-311-9463

NSN 4820-01-311-9463 · NIIN 013119463

FSC 4820 — Valves, Nonpowered · FSG 48 — Valves

Government record, cited

Also searched as 4820-01-311-9463 · 4820013119463 · NIIN 013119463 · 01-311-9463 · FSC 4820 Valves, Nonpowered · 281343 · 281343-0002 · PRV55B-1

Nearby stock numbers ← 4820-01-311-9462 Valve, Safety Relief · 4820-01-311-9464 Valve, Safety Relief →

4820-01-311-9463 — Valves, Nonpowered

Features

Valve,safety Relief — FSC 4820

Identification

NSN: 4820-01-311-9463
NIIN: 013119463
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves

General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-01-311-9463, 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Supply Class 4820 (Valves, Nonpowered) of the Valves group. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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	4820-01-311-9463
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 4

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

4820-01-311-9504187894-0013 POSSIBLE MATCH

CAP,VALVE

Possible match (shared part number)Marotta Controls Inc

4730-01-313-45334781311-0006 POSSIBLE MATCH

NUT,TUBE COUPLING

Possible match (shared part number)Marotta Controls Inc

4820-01-345-5552281354-0007 POSSIBLE MATCH

VALVE,SAFETY RELIEF

Possible match (shared part number)Marotta Controls Inc

4820-01-346-1650281343-0006 POSSIBLE MATCH

VALVE,SAFETY RELIEF

Possible match (shared part number)Marotta Controls Inc

Cross-Reference Index

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

Reference documents

Reference	Meaning
281343	D/9 Drawing number reference only U.S. Government activity
281343-0002	5/2 Secondary reference U.S. Government activity
PRV55B-1	3/2 Design control — primary reference U.S. Government activity

Related Parts

4820-01-311-9504POSSIBLE MATCH

CAP,VALVE

187894-0013

4730-01-313-4533POSSIBLE MATCH

NUT,TUBE COUPLING

4781311-0006

4820-01-345-5552POSSIBLE MATCH

VALVE,SAFETY RELIEF

281354-0007

4820-01-346-1650POSSIBLE MATCH

VALVE,SAFETY RELIEF

281343-0006

Frequently Asked Questions

What is NSN 4820-01-311-9463?

NSN 4820-01-311-9463 is a Valve,safety Relief, classified under FSC 4820, Valves, Nonpowered. Status: active.

What NSN replaces 4820-01-311-9463?

4 possible matches (shared part number, not a government interchangeability claim): 4820-01-311-9504, 4730-01-313-4533, 4820-01-345-5552. Verify interchangeability with system specifications before substitution.

Is NSN 4820-01-311-9463 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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