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NSN 4820-01-240-6566Government record, cited

Seat, Valve4820-01-240-6566

NSN 4820-01-240-6566 · NIIN 012406566

FSC 4820 — Valves, Nonpowered · FSG 48 — Valves

Government record, cited

Also searched as 4820-01-240-6566 · 4820012406566 · NIIN 012406566 · 01-240-6566 · FSC 4820 Valves, Nonpowered

Nearby stock numbers ← 4820-01-240-6448 · 4820-01-240-6634 →

4820-01-240-6566 — Valves, Nonpowered

Features

Seat,valve — FSC 4820
Body Outside Diameter: 4.625 INCHES NOMINAL IN
Criticality Code Justification: ZZZY
Style Designator: PLAIN
Body Inside Diameter: 1.000 INCHES NOMINAL IN
Surface Treatment: ZINC OVERALL
Material: STEEL OVERALL
Reference Number Differentiating Characteristics: MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS

Identification

NSN: 4820-01-240-6566
NIIN: 012406566
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves

General Description

The Seat,valve, cataloged under National Stock Number 4820-01-240-6566, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 7 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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	4820-01-240-6566
Item Name	Seat,valve
FSC / FSG	4820 / 48 — Valves, Nonpowered
Status	ACTIVE
Body Outside Diameter	4.625 INCHES NOMINAL IN
Criticality Code Justification	ZZZY
Style Designator	PLAIN
Body Inside Diameter	1.000 INCHES NOMINAL IN
Surface Treatment	ZINC OVERALL
Material	STEEL OVERALL
Reference Number Differentiating Characteristics	MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL F — Mutilate — Cut
Hazard	No hazard code in the DLA record (HMIC N)
Criticality Code	C

Cross-Reference Index

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

Reference documents

Reference	Meaning
803-2177917-05X-29	3/1 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 4820-01-240-6566?

NSN 4820-01-240-6566 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.

What are the specifications of 4820-01-240-6566?

Key specifications for 4820-01-240-6566: Overall Height: 0.625 INCHES NOMINAL IN; Body Outside Diameter: 4.625 INCHES NOMINAL IN; Criticality Code Justification: ZZZY; Style Designator: PLAIN. 7 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-240-6566 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 4820-01-240-6566?

NSN 4820-01-240-6566 has DEMIL Code F. 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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