Seat, Valve4820-01-020-9880

NSN 4820-01-020-9880 · NIIN 010209880

FSC 4820 — Valves, Nonpowered · FSG 48 — Valves

Government record, cited

Also searched as 4820-01-020-9880 · 4820010209880 · NIIN 010209880 · 01-020-9880 · FSC 4820 Valves, Nonpowered · 134B509FY · B708E01A

Nearby stock numbers ← 4820-01-020-9879 Seat, Valve · 4820-01-020-9962 →

4820-01-020-9880 — Valves, Nonpowered

Features

Seat,valve — FSC 4820
Flange Seat to Disk End Height: 1.437 INCHES NOMINAL IN
Flange Diameter: 2.6260 INCHES MINIMUM AND 2.6265 INCHES MAXIMUM IN
Body Outside Diameter: 2.046 INCHES MINIMUM AND 2.062 INCHES MAXIMUM IN
Body Stepped Inside Diameter: 1.125 INCHES NOMINAL FIRST STEP IN
Body Stepped Inside Diameter: 1.451 INCHES NOMINAL SECOND STEP IN
Style Designator: PLAIN FLANGED
Material Document and Classification: MIL-N-6710,COND E,FINISH 4 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL

Identification

NSN: 4820-01-020-9880
NIIN: 010209880
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves

General Description

The Seat,valve, cataloged under National Stock Number 4820-01-020-9880, 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10 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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	4820-01-020-9880
Item Name	Seat,valve
FSC / FSG	4820 / 48 — Valves, Nonpowered
Status	ACTIVE
Flange Seat to Disk End Height	1.437 INCHES NOMINAL IN
Flange Diameter	2.6260 INCHES MINIMUM AND 2.6265 INCHES MAXIMUM IN
Body Outside Diameter	2.046 INCHES MINIMUM AND 2.062 INCHES MAXIMUM IN
Body Stepped Inside Diameter	1.125 INCHES NOMINAL FIRST STEP IN
Body Stepped Inside Diameter	1.451 INCHES NOMINAL SECOND STEP IN
Style Designator	PLAIN FLANGED
Material Document and Classification	MIL-N-6710,COND E,FINISH 4 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
Seat Radius	0.337 INCHES NOMINAL IN
Under Flange Height	0.482 INCHES NOMINAL IN
Material	NICKEL ALLOY OVERALL

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
134B509FY	5/9 Secondary reference General Electric Co Naval and Drive Turbine Systems Dept
B708E01A	3/9 Design control — primary reference General Electric Co Naval and Drive Turbine Systems Dept

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 4820-01-020-9880?

NSN 4820-01-020-9880 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.

What are the specifications of 4820-01-020-9880?

Key specifications for 4820-01-020-9880: Flange Seat to Disk End Height: 1.437 INCHES NOMINAL IN; Flange Diameter: 2.6260 INCHES MINIMUM AND 2.6265 INCHES MAXIMUM IN; Body Outside Diameter: 2.046 INCHES MINIMUM AND 2.062 INCHES MAXIMUM IN; Body Stepped Inside Diameter: 1.125 INCHES NOMINAL FIRST STEP IN. 10 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-020-9880 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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