Valve, Check4820-01-680-4121

NSN 4820-01-680-4121 · NIIN 016804121 · Part number 90 A-21

Cla-Val Co Div of Griswold Industries · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 0WA45

Government record, cited

NSN 4820-01-680-4121 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-680-4121. Manufacturer of record part number: 90 A-21.

Also searched as 4820-01-680-4121 · 4820016804121 · NIIN 016804121 · 01-680-4121 · FSC 4820 Valves, Nonpowered · CAGE 0WA45 · 90 A-21

Nearby stock numbers ← 4820-01-680-3950 Tailpiece, Valve · 4820-01-680-4130 Valve, Check →

4820-01-680-4121 — Valves, Nonpowered

Features

Valve,check — FSC 4820
Style Designator: ANGLE
1 manufacturer part number on file
Manufacturer of record: Cla-Val Co Div of Griswold Industries

Identification

NSN: 4820-01-680-4121
NIIN: 016804121
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 90 A-21
Manufacturer: Cla-Val Co Div of Griswold Industries

General Description

The Valve,check, cataloged under National Stock Number 4820-01-680-4121, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Cla-Val Co Div of Griswold Industries. 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. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4820-01-680-4121
Primary Part Number	90 A-21
Item Name	Valve,check
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Cla-Val Co Div of Griswold Industries
Status	ACTIVE
Style Designator	ANGLE

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
90 A-21 PRIMARY	Cla-Val Co Div of Griswold Industries (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 4820-01-680-4121?

NSN 4820-01-680-4121 is a Valve,check, manufactured by Cla-Val Co Div of Griswold Industries, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-680-4121?

NSN 4820-01-680-4121 has 1 manufacturer part number on file: 90 A-21 (Cla-Val Co Div of Griswold Industries).

What are the specifications of 90 A-21?

Key specifications for 90 A-21: Style Designator: ANGLE; Part Name Assigned by Controlling Agency: FIRE PROTECTION PRESSURE REDUCING VALVE. 1 specification is documented in the U.S. Government catalog.

Is NSN 4820-01-680-4121 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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