Seat, Valve4820-01-121-0984

NSN 4820-01-121-0984 · NIIN 011210984 · Part number MC15090

Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 76050

Government record, cited

NSN 4820-01-121-0984 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-121-0984. Manufacturer of record part number: MC15090.

Also searched as 4820-01-121-0984 · 4820011210984 · NIIN 011210984 · 01-121-0984 · FSC 4820 Valves, Nonpowered · CAGE 76050 · MC15090

Nearby stock numbers ← 4820-01-121-0964 · 4820-01-121-1316 Piston, Sensing, Valve →

4820-01-121-0984 — Valves, Nonpowered

Features

Seat,valve — FSC 4820
Flange Seat to Disk End Height: 0.510 INCHES MINIMUM AND 0.540 INCHES MAXIMUM IN
Flange Diameter: 1.425 INCHES MINIMUM AND 1.427 INCHES MAXIMUM IN
Style Designator: THREADED FLANGED
Material Document and Classification: QQ-A-200/3 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Body Inside Diameter: 0.660 INCHES NOMINAL IN
Under Flange Height: 1.790 INCHES NOMINAL IN
Material: ALUMINUM ALLOY 2024 OVERALL

Identification

NSN: 4820-01-121-0984
NIIN: 011210984
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: MC15090
Manufacturer: Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace

General Description

The Seat,valve, cataloged under National Stock Number 4820-01-121-0984, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4820-01-121-0984
Primary Part Number	MC15090
Item Name	Seat,valve
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace
Status	ACTIVE
Flange Seat to Disk End Height	0.510 INCHES MINIMUM AND 0.540 INCHES MAXIMUM IN
Flange Diameter	1.425 INCHES MINIMUM AND 1.427 INCHES MAXIMUM IN
Style Designator	THREADED FLANGED
Material Document and Classification	QQ-A-200/3 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Body Inside Diameter	0.660 INCHES NOMINAL IN
Under Flange Height	1.790 INCHES NOMINAL IN
Material	ALUMINUM ALLOY 2024 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

Part Number	Manufacturer
MC15090 PRIMARY	Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace (USA)

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 4820-01-121-0984?

NSN 4820-01-121-0984 is a Seat,valve, manufactured by Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-121-0984?

NSN 4820-01-121-0984 has 1 manufacturer part number on file: MC15090 (Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace).

What are the specifications of MC15090?

Key specifications for MC15090: Flange Seat to Disk End Height: 0.510 INCHES MINIMUM AND 0.540 INCHES MAXIMUM IN; Flange Diameter: 1.425 INCHES MINIMUM AND 1.427 INCHES MAXIMUM IN; Style Designator: THREADED FLANGED; Material Document and Classification: QQ-A-200/3 FED SPEC SINGLE MATERIAL RESPONSE OVERALL. 8 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-121-0984 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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