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NSN 4820-01-132-3557Government record, cited

Seat, Valve4820-01-132-3557

NSN 4820-01-132-3557 · NIIN 011323557

FSC 4820 — Valves, Nonpowered · FSG 48 — Valves

Government record, cited

Also searched as 4820-01-132-3557 · 4820011323557 · NIIN 011323557 · 01-132-3557 · FSC 4820 Valves, Nonpowered

Nearby stock numbers ← 4820-01-132-3556 Seat, Valve · 4820-01-132-3589 Parts Kit, Safety Relief Valve →

4820-01-132-3557 — Valves, Nonpowered

Features

Seat,valve — FSC 4820
Flange Seat to Disk End Height: 0.171 INCHES NOMINAL IN
Flange Diameter: 0.500 INCHES NOMINAL IN
Body Outside Diameter: 0.312 INCHES MINIMUM AND 0.316 INCHES MAXIMUM IN
Style Designator: PLAIN FLANGED
Material Document and Classification: QQ-A-264 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Body Inside Diameter: 0.203 INCHES NOMINAL IN
Seat Radius: 0.040 INCHES NOMINAL IN

Identification

NSN: 4820-01-132-3557
NIIN: 011323557
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves

General Description

The Seat,valve, cataloged under National Stock Number 4820-01-132-3557, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 10 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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	4820-01-132-3557
Item Name	Seat,valve
FSC / FSG	4820 / 48 — Valves, Nonpowered
Status	ACTIVE
Flange Seat to Disk End Height	0.171 INCHES NOMINAL IN
Flange Diameter	0.500 INCHES NOMINAL IN
Body Outside Diameter	0.312 INCHES MINIMUM AND 0.316 INCHES MAXIMUM IN
Style Designator	PLAIN FLANGED
Material Document and Classification	QQ-A-264 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Body Inside Diameter	0.203 INCHES NOMINAL IN
Seat Radius	0.040 INCHES NOMINAL IN
Under Flange Height	0.112 INCHES NOMINAL IN
Material	ALUMINUM ALLOY 2024 OVERALL
Seating Surface Shape	RADIAL

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL Q — CCL Item — Commerce Control List
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
734071	3/2 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 4820-01-132-3557?

NSN 4820-01-132-3557 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.

What are the specifications of 4820-01-132-3557?

Key specifications for 4820-01-132-3557: Flange Seat to Disk End Height: 0.171 INCHES NOMINAL IN; Flange Diameter: 0.500 INCHES NOMINAL IN; Body Outside Diameter: 0.312 INCHES MINIMUM AND 0.316 INCHES MAXIMUM IN; Style Designator: PLAIN FLANGED. 10 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-132-3557 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.

What is the DEMIL code for NSN 4820-01-132-3557?

NSN 4820-01-132-3557 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.

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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