Seat, Valve4820-01-464-5478

NSN 4820-01-464-5478 · NIIN 014645478 · Part number 1663-D 2IN PC17

Lawler Manufacturing Company, Inc. · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 75545

Government record, cited

NSN 4820-01-464-5478 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-464-5478. Manufacturer of record part number: 1663-D 2IN PC17.

Also searched as 4820-01-464-5478 · 4820014645478 · NIIN 014645478 · 01-464-5478 · FSC 4820 Valves, Nonpowered · CAGE 75545 · 1663-D 2IN PC17 · 3280-02

Nearby stock numbers ← 4820-01-464-5099 K-Valve Assembly · 4820-01-464-5486 Seat, Valve →

4820-01-464-5478 — Valves, Nonpowered

Features

Seat,valve — FSC 4820
Flange Seat to Disk End Height: 0.750 INCHES NOMINAL IN
Flange Diameter: 2.125 INCHES NOMINAL IN
Style Designator: THREADED FLANGED
Body Inside Diameter: 1.656 INCHES NOMINAL IN
Under Flange Height: 0.375 INCHES NOMINAL IN
Material: COPPER ALLOY SEAT
Seating Surface Shape: FLAT

Identification

NSN: 4820-01-464-5478
NIIN: 014645478
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 1663-D 2IN PC17
Manufacturer: Lawler Manufacturing Company, Inc.

General Description

The Seat,valve, cataloged under National Stock Number 4820-01-464-5478, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Lawler Manufacturing Company, Inc.. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4820-01-464-5478
Primary Part Number	1663-D 2IN PC17
Item Name	Seat,valve
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Lawler Manufacturing Company, Inc.
Status	ACTIVE
Flange Seat to Disk End Height	0.750 INCHES NOMINAL IN
Flange Diameter	2.125 INCHES NOMINAL IN
Style Designator	THREADED FLANGED
Body Inside Diameter	1.656 INCHES NOMINAL IN
Under Flange Height	0.375 INCHES NOMINAL IN
Material	COPPER ALLOY SEAT
Seating Surface Shape	FLAT

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
3280-02	Lawler Manufacturing Company, Inc. (USA)
1663-D 2IN PC17 PRIMARY	Lawler Manufacturing Company, Inc. (USA)

Frequently Asked Questions

What is NSN 4820-01-464-5478?

NSN 4820-01-464-5478 is a Seat,valve, manufactured by Lawler Manufacturing Company, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-464-5478?

NSN 4820-01-464-5478 has 2 manufacturer part numbers on file: 3280-02 (Lawler Manufacturing Company, Inc.), 1663-D 2IN PC17 (Lawler Manufacturing Company, Inc.).

What are the specifications of 1663-D 2IN PC17?

Key specifications for 1663-D 2IN PC17: Flange Seat to Disk End Height: 0.750 INCHES NOMINAL IN; Flange Diameter: 2.125 INCHES NOMINAL IN; Style Designator: THREADED FLANGED; Body Inside Diameter: 1.656 INCHES NOMINAL IN. 7 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-464-5478 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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