Seat, Valve4820-01-144-3264

NSN 4820-01-144-3264 · NIIN 011443264

FSC 4820 — Valves, Nonpowered · FSG 48 — Valves

Government record, cited

Also searched as 4820-01-144-3264 · 4820011443264 · NIIN 011443264 · 01-144-3264 · FSC 4820 Valves, Nonpowered · 76774-35X2 · SSBN640-501-2146471 · SSBN640-501-2146471 PC 34

Nearby stock numbers ← 4820-01-144-3263 Seat, Valve · 4820-01-144-3370 Valve Assembly, Hydraulic →

4820-01-144-3264 — Valves, Nonpowered

Features

Seat,valve — FSC 4820
Flange Seat to Disk End Height: 0.625 INCHES NOMINAL IN
Flange Diameter: 17.500 INCHES NOMINAL IN
Body Outside Diameter: 15.375 INCHES NOMINAL IN
Style Designator: PLAIN FLANGED
Material Document and Classification: QQS-766 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Body Inside Diameter: 13.000 INCHES NOMINAL IN
Seat Radius: 0.010 INCHES NOMINAL IN

Identification

NSN: 4820-01-144-3264
NIIN: 011443264
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves

General Description

The Seat,valve, cataloged under National Stock Number 4820-01-144-3264, 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10 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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	4820-01-144-3264
Item Name	Seat,valve
FSC / FSG	4820 / 48 — Valves, Nonpowered
Status	ACTIVE
Flange Seat to Disk End Height	0.625 INCHES NOMINAL IN
Flange Diameter	17.500 INCHES NOMINAL IN
Body Outside Diameter	15.375 INCHES NOMINAL IN
Style Designator	PLAIN FLANGED
Material Document and Classification	QQS-766 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Body Inside Diameter	13.000 INCHES NOMINAL IN
Seat Radius	0.010 INCHES NOMINAL IN
Under Flange Height	0.750 INCHES NOMINAL IN
Material	STEEL CORROSION RESISTING OVERALL
Seating Surface Shape	RADIAL

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
76774-35X2	3/2 Design control — primary reference U.S. Government activity
SSBN640-501-2146471	D/9 Drawing number reference only U.S. Government activity
SSBN640-501-2146471 PC 34	3/2 Design control — primary reference U.S. Government activity

Frequently Asked Questions

What is NSN 4820-01-144-3264?

NSN 4820-01-144-3264 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.

What are the specifications of 4820-01-144-3264?

Key specifications for 4820-01-144-3264: Flange Seat to Disk End Height: 0.625 INCHES NOMINAL IN; Flange Diameter: 17.500 INCHES NOMINAL IN; Body Outside Diameter: 15.375 INCHES NOMINAL IN; Style Designator: PLAIN FLANGED. 10 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-144-3264 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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