Seat, Valve4820-01-143-5403

NSN 4820-01-143-5403 · NIIN 011435403

FSC 4820 — Valves, Nonpowered · FSG 48 — Valves

Government record, cited

Also searched as 4820-01-143-5403 · 4820011435403 · NIIN 011435403 · 01-143-5403 · FSC 4820 Valves, Nonpowered · 10124642 · 3025T42P01

Nearby stock numbers ← 4820-01-143-5350 · 4820-01-143-5417 →

4820-01-143-5403 — Valves, Nonpowered

Features

Seat,valve — FSC 4820
Flange Seat to Disk End Height: 0.110 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
Flange Diameter: 0.797 INCHES MINIMUM AND 0.798 INCHES MAXIMUM IN
Body Outside Diameter: 0.430 INCHES MINIMUM AND 0.435 INCHES MAXIMUM IN
Style Designator: PLAIN FLANGED
Material Document and Classification: AMS5640 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Body Inside Diameter: 0.370 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
Under Flange Height: 0.181 INCHES MINIMUM AND 0.189 INCHES MAXIMUM IN

Identification

NSN: 4820-01-143-5403
NIIN: 011435403
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves

General Description

The Seat,valve, cataloged under National Stock Number 4820-01-143-5403, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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	4820-01-143-5403
Item Name	Seat,valve
FSC / FSG	4820 / 48 — Valves, Nonpowered
Status	ACTIVE
Flange Seat to Disk End Height	0.110 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
Flange Diameter	0.797 INCHES MINIMUM AND 0.798 INCHES MAXIMUM IN
Body Outside Diameter	0.430 INCHES MINIMUM AND 0.435 INCHES MAXIMUM IN
Style Designator	PLAIN FLANGED
Material Document and Classification	AMS5640 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Body Inside Diameter	0.370 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
Under Flange Height	0.181 INCHES MINIMUM AND 0.189 INCHES MAXIMUM IN
Material	STEEL COMP 303 OVERALL
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

No manufacturer part numbers on file in the U.S. Government catalog.

Reference documents

Reference	Meaning
10124642	6/9 Informative reference only Nimikkeistokeskus Ncb Finland
3025T42P01	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 4820-01-143-5403?

NSN 4820-01-143-5403 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.

What are the specifications of 4820-01-143-5403?

Key specifications for 4820-01-143-5403: Flange Seat to Disk End Height: 0.110 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN; Flange Diameter: 0.797 INCHES MINIMUM AND 0.798 INCHES MAXIMUM IN; Body Outside Diameter: 0.430 INCHES MINIMUM AND 0.435 INCHES MAXIMUM IN; Style Designator: PLAIN FLANGED. 9 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-143-5403 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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