Valve, Safety Relief4820-00-566-9804

NSN 4820-00-566-9804 · NIIN 005669804

FSC 4820 — Valves, Nonpowered · FSG 48 — Valves

Government record, cited

Also searched as 4820-00-566-9804 · 4820005669804 · NIIN 005669804 · 00-566-9804 · FSC 4820 Valves, Nonpowered · L1881-5 · 1251512

Nearby stock numbers ← 4820-00-566-9802 · 4820-00-566-9809 →

4820-00-566-9804 — Valves, Nonpowered

Features

Valve,safety Relief — FSC 4820
Flow Control Device: DISK
Renewable Seat Ring Type: PRESSED-IN
Nominal Pipe Size Accommodated: 0.750 INCHES ALL ENDS IN
Connection Style: PLAIN,OPTIONAL END(PIPE) ALL ENDS
Connection Type: THREADED INTERNAL PIPE ALL ENDS
Style Designator: ANGLE
Thread Direction: RIGHT-HAND ALL ENDS

Identification

NSN: 4820-00-566-9804
NIIN: 005669804
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves

General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-00-566-9804, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4820-00-566-9804
Item Name	Valve,safety Relief
FSC / FSG	4820 / 48 — Valves, Nonpowered
Status	ACTIVE
Flow Control Device	DISK
Renewable Seat Ring Type	PRESSED-IN
Nominal Pipe Size Accommodated	0.750 INCHES ALL ENDS IN
Connection Style	PLAIN,OPTIONAL END(PIPE) ALL ENDS
Connection Type	THREADED INTERNAL PIPE ALL ENDS
Style Designator	ANGLE
Thread Direction	RIGHT-HAND ALL ENDS
Nominal Thread Size	0.750 INCHES ALL ENDS IN
Disk Loading Method	SPRING
Thread Series Designator	NPT ALL ENDS
Valve Discharge Flow Rate	28.0 GALLONS PER MINUTE
Valve Operation Method	AUTOMATIC

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

Cross-Reference Index

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

Reference documents

Reference	Meaning
L1881-5	5/9 Secondary reference U.S. Government activity
1251512	3/9 Design control — primary reference U.S. Government activity

No interchangeability data on file.

Other items in FSC 4820 — Valves, Nonpowered

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

4820-00-000-0097

4820-00-000-0097 · Item name not on file

4820-00-001-0010

VALVE,ROTARY,SELECTOR

4820-00-001-0020

4820-00-001-0020 · Item name not on file

4820-00-001-0021

4820-00-001-0021 · Item name not on file

4820-00-001-0032

4820-00-001-0032 · Item name not on file

4820-00-001-0037

VALVE,SAFETY RELIEF

4820-00-001-0042

4820-00-001-0042 · Item name not on file

4820-00-001-1230

4820-00-001-1230 · Item name not on file

Frequently Asked Questions

What is NSN 4820-00-566-9804?

NSN 4820-00-566-9804 is a Valve,safety Relief, classified under FSC 4820, Valves, Nonpowered. Status: active.

What are the specifications of 4820-00-566-9804?

Key specifications for 4820-00-566-9804: Flow Control Device: DISK; Renewable Seat Ring Type: PRESSED-IN; Nominal Pipe Size Accommodated: 0.750 INCHES ALL ENDS IN; Connection Style: PLAIN,OPTIONAL END(PIPE) ALL ENDS. 12 specifications are documented in the U.S. Government catalog.

Is NSN 4820-00-566-9804 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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