Seat, Valve4820-01-274-8420

NSN 4820-01-274-8420 · NIIN 012748420

FSC 4820 — Valves, Nonpowered · FSG 48 — Valves

Government record, cited

Also searched as 4820-01-274-8420 · 4820012748420 · NIIN 012748420 · 01-274-8420 · FSC 4820 Valves, Nonpowered · 1947-5A PIECE 5 · 1947-5-5 · 1947-5-5 · 1947-5A

Nearby stock numbers ← 4820-01-274-8419 · 4820-01-274-8574 →

4820-01-274-8420 — Valves, Nonpowered

Features

Seat,valve — FSC 4820
Body Outside Diameter: 6.503 INCHES NOMINAL IN
Style Designator: PLAIN
Body Inside Diameter: 5.625 INCHES NOMINAL IN
Seat Radius: 0.125 INCHES NOMINAL IN
Material: STEEL OVERALL
Seating Surface Shape: RADIAL

Identification

NSN: 4820-01-274-8420
NIIN: 012748420
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves

General Description

The Seat,valve, cataloged under National Stock Number 4820-01-274-8420, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 6 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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	4820-01-274-8420
Item Name	Seat,valve
FSC / FSG	4820 / 48 — Valves, Nonpowered
Status	ACTIVE
Body Outside Diameter	6.503 INCHES NOMINAL IN
Style Designator	PLAIN
Body Inside Diameter	5.625 INCHES NOMINAL IN
Seat Radius	0.125 INCHES NOMINAL IN
Material	STEEL 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
1947-5A PIECE 5	5/9 Secondary reference U.S. Government activity
1947-5-5	C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity
1947-5-5	3/9 Design control — primary reference U.S. Government activity
1947-5A	D/9 Drawing number reference only U.S. Government activity

Frequently Asked Questions

What is NSN 4820-01-274-8420?

NSN 4820-01-274-8420 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.

What are the specifications of 4820-01-274-8420?

Key specifications for 4820-01-274-8420: Overall Height: 1.527 INCHES MINIMUM AND 2.062 INCHES MAXIMUM IN; Body Outside Diameter: 6.503 INCHES NOMINAL IN; Style Designator: PLAIN; Body Inside Diameter: 5.625 INCHES NOMINAL IN. 6 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-274-8420 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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