PartsTable TECHNICAL DATA SHEET

NSN 4820-01-481-2998Government record, cited

Valve, Stop-Check4820-01-481-2998

NSN 4820-01-481-2998 · NIIN 014812998 · Part number MC21237

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

Government record, cited

NSN 4820-01-481-2998 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-481-2998. Manufacturer of record part number: MC21237.

Also searched as 4820-01-481-2998 · 4820014812998 · NIIN 014812998 · 01-481-2998 · FSC 4820 Valves, Nonpowered · CAGE 76050 · MC21237

Nearby stock numbers ← 4820-01-481-2943 Valve, Stop and Stop Check · 4820-01-481-3170 Valve, Ball →

4820-01-481-2998 — Valves, Nonpowered

Features

Valve,stop-Check — FSC 4820
Criticality Code Justification: AGAV
1 manufacturer part number on file
Manufacturer of record: Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace

Identification

NSN: 4820-01-481-2998
NIIN: 014812998
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: MC21237
Manufacturer: Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace

General Description

The Valve,stop-Check, cataloged under National Stock Number 4820-01-481-2998, 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 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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	4820-01-481-2998
Primary Part Number	MC21237
Item Name	Valve,stop-Check
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace
Status	ACTIVE
Criticality Code Justification	AGAV

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL A — No Demilitarization Required
Hazard	No hazard code in the DLA record (HMIC N)
Criticality Code	Y

Cross-Reference Index

Part Number	Manufacturer
MC21237 PRIMARY	Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace (USA)

Reference documents

Reference	Meaning
MC21237	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 4820-01-481-2998?

NSN 4820-01-481-2998 is a Valve,stop-Check, 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 4820-01-481-2998?

NSN 4820-01-481-2998 has 1 manufacturer part number on file: MC21237 (Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace).

What are the specifications of MC21237?

Key specifications for MC21237: Criticality Code Justification: AGAV; Part Name Assigned by Controlling Agency: (INAVY)VALVE, STOP-CHECK; End Item Identification: VALVE, LINEAR, DIRECT;F/A-18E/F AILERON;F/A-18E/F SUPPORT OF ECP 6038. 1 specification is documented in the U.S. Government catalog.

Is NSN 4820-01-481-2998 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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