PartsTable TECHNICAL DATA SHEET

NSN 4820-01-263-5522Government record, cited

Valve, Safety Relief4820-01-263-5522

NSN 4820-01-263-5522 · NIIN 012635522

FSC 4820 — Valves, Nonpowered · FSG 48 — Valves

Government record, cited

Also searched as 4820-01-263-5522 · 4820012635522 · NIIN 012635522 · 01-263-5522 · FSC 4820 Valves, Nonpowered · 59610-4 · 59610-TAB

Nearby stock numbers ← 4820-01-263-5355 · 4820-01-263-5662 Valve, Tee →

4820-01-263-5522 — Valves, Nonpowered

Features

Valve,safety Relief — FSC 4820

Identification

NSN: 4820-01-263-5522
NIIN: 012635522
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves

General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-01-263-5522, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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	4820-01-263-5522
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)

⇄ Related Items 3

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

4820-01-266-814459610-8 AND 59610-TAB POSSIBLE MATCH

VALVE,SAFETY RELIEF

Possible match (shared part number)Eaton Aerospace Llc Dba Eaton Aerospace Jackson

4820-01-316-967359610-6 POSSIBLE MATCH

VALVE,SAFETY RELIEF

Possible match (shared part number)Eaton Aerospace Llc Dba Eaton Aerospace Jackson

4730-01-318-4230S60-8-6F POSSIBLE MATCH

TAILPIECE,UNION

Possible match (shared part number)Eaton Aerospace Llc Dba Eaton Aerospace Jackson

Cross-Reference Index

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

Reference documents

Reference	Meaning
59610-4	3/2 Design control — primary reference U.S. Government activity
59610-TAB	5/2 Secondary reference U.S. Government activity

Related Parts

4820-01-266-8144POSSIBLE MATCH

VALVE,SAFETY RELIEF

59610-8 AND 59610-TAB

4820-01-316-9673POSSIBLE MATCH

VALVE,SAFETY RELIEF

59610-6

4730-01-318-4230POSSIBLE MATCH

TAILPIECE,UNION

S60-8-6F

Frequently Asked Questions

What is NSN 4820-01-263-5522?

NSN 4820-01-263-5522 is a Valve,safety Relief, classified under FSC 4820, Valves, Nonpowered. Status: active.

What NSN replaces 4820-01-263-5522?

3 possible matches (shared part number, not a government interchangeability claim): 4820-01-266-8144, 4820-01-316-9673, 4730-01-318-4230. Verify interchangeability with system specifications before substitution.

Is NSN 4820-01-263-5522 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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