Valve, Safety Relief4820-00-287-2976

NSN 4820-00-287-2976 · NIIN 002872976

FSC 4820 — Valves, Nonpowered · FSG 48 — Valves

Government record, cited

Also searched as 4820-00-287-2976 · 4820002872976 · NIIN 002872976 · 00-287-2976 · FSC 4820 Valves, Nonpowered

Nearby stock numbers ← 4820-00-287-2975 · 4820-00-287-2977 →

4820-00-287-2976 — Valves, Nonpowered

Features

Valve,safety Relief — FSC 4820
Flow Control Device: POPPET
Nominal Pipe Size Accommodated: 1.250 INCHES FIRST END IN
Connection Type: UNTHREADED INTERNAL PIPE FIRST END
Connection Type: UNTHREADED INTERNAL PIPE SECOND END
Style Designator: ANGLE
Adjustable Pressure Range: +300.0 TO 1000.0 POUNDS PER SQUARE INCH LBS
Nondefinitive Spec/std Data: A1 TYPE AND C CLASS

Identification

NSN: 4820-00-287-2976
NIIN: 002872976
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves

General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-00-287-2976, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 13 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4820-00-287-2976
Item Name	Valve,safety Relief
FSC / FSG	4820 / 48 — Valves, Nonpowered
Status	ACTIVE
Flow Control Device	POPPET
Nominal Pipe Size Accommodated	1.250 INCHES FIRST END IN
Connection Type	UNTHREADED INTERNAL PIPE FIRST END
Connection Type	UNTHREADED INTERNAL PIPE SECOND END
Style Designator	ANGLE
Adjustable Pressure Range	+300.0 TO 1000.0 POUNDS PER SQUARE INCH LBS
Nondefinitive Spec/std Data	A1 TYPE AND C CLASS
Disk Loading Method	SPRING
Material	COPPER ALLOY BODY
Material	COPPER ALLOY STEM
Material	COPPER ALLOY SEAT
Material	COPPER ALLOY AND NICKEL ALLOY FLOW CONTROL DEVICE
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
1836CCU 1/2IN 300T1000PSI SBU	3/1 Design control — primary reference Ashcroft Inc Dba Heise

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 4820-00-287-2976?

NSN 4820-00-287-2976 is a Valve,safety Relief, classified under FSC 4820, Valves, Nonpowered. Status: active.

What are the specifications of 4820-00-287-2976?

Key specifications for 4820-00-287-2976: Flow Control Device: POPPET; Nominal Pipe Size Accommodated: 1.250 INCHES FIRST END IN; Connection Type: UNTHREADED INTERNAL PIPE FIRST END; Connection Type: UNTHREADED INTERNAL PIPE SECOND END. 13 specifications are documented in the U.S. Government catalog.

Is NSN 4820-00-287-2976 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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