Valve, Safety Relief4820-01-133-1646

NSN 4820-01-133-1646 · NIIN 011331646 · Part number AG258

Gast Mfg Corp · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 24123

Government record, cited

NSN 4820-01-133-1646 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-133-1646. Manufacturer of record part number: AG258.

Also searched as 4820-01-133-1646 · 4820011331646 · NIIN 011331646 · 01-133-1646 · FSC 4820 Valves, Nonpowered · CAGE 24123 · AG258

Nearby stock numbers ← 4820-01-133-1645 Valve, Globe · 4820-01-133-1647 Valve, Safety Relief →

4820-01-133-1646 — Valves, Nonpowered

Features

Valve,safety Relief — FSC 4820
Nominal Thread Size: 1.500 INCHES FIRST END IN
Material: IRON CAST BODY
Thread Series Designator: NPT FIRST END
Valve Operation Method: AUTOMATIC
1 manufacturer part number on file
Manufacturer of record: Gast Mfg Corp

Identification

NSN: 4820-01-133-1646
NIIN: 011331646
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: AG258
Manufacturer: Gast Mfg Corp

General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-01-133-1646, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Gast Mfg Corp. Government technical data includes 4 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4820-01-133-1646
Primary Part Number	AG258
Item Name	Valve,safety Relief
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Gast Mfg Corp
Status	ACTIVE
Nominal Thread Size	1.500 INCHES FIRST END IN
Material	IRON CAST BODY
Thread Series Designator	NPT FIRST END
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

Part Number	Manufacturer
AG258 PRIMARY	Gast Mfg Corp (USA)

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 4820-01-133-1646?

NSN 4820-01-133-1646 is a Valve,safety Relief, manufactured by Gast Mfg Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-133-1646?

NSN 4820-01-133-1646 has 1 manufacturer part number on file: AG258 (Gast Mfg Corp).

What are the specifications of AG258?

Key specifications for AG258: Nominal Thread Size: 1.500 INCHES FIRST END IN; Material: IRON CAST BODY; Thread Series Designator: NPT FIRST END; Valve Operation Method: AUTOMATIC. 4 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-133-1646 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.

PartsTable Design LLC · partstable.com