PartsTable TECHNICAL DATA SHEET

NSN 4820-01-274-1720Government record, cited

Valve, Restrictor Check4820-01-274-1720

NSN 4820-01-274-1720 · NIIN 012741720 · Part number WM412A-112841

Williams Controls Inc · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 11331

Government record, cited

NSN 4820-01-274-1720 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-274-1720. Manufacturer of record part number: WM412A-112841.

Also searched as 4820-01-274-1720 · 4820012741720 · NIIN 012741720 · 01-274-1720 · FSC 4820 Valves, Nonpowered · CAGE 11331 · WM412A-112841 · 750-774

Nearby stock numbers ← 4820-01-274-1688 Valve, Expansion · 4820-01-274-1721 Valve, Ball →

4820-01-274-1720 — Valves, Nonpowered

Features

Valve,restrictor Check — FSC 4820
1 manufacturer part number on file
Manufacturer of record: Williams Controls Inc

Identification

NSN: 4820-01-274-1720
NIIN: 012741720
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: WM412A-112841
Manufacturer: Williams Controls Inc

General Description

The Valve,restrictor Check, cataloged under National Stock Number 4820-01-274-1720, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Williams Controls Inc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.

Catalog Facts

Item Name	Valve,restrictor Check
FSC / FSG	4820 — Valves, Nonpowered (FSG 48)
Manufacturers	Williams Controls Inc (CAGE 11331)

Technical Specifications

Parameter	Value
NSN	4820-01-274-1720
Primary Part Number	WM412A-112841
Item Name	Valve,restrictor Check
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Williams Controls Inc
Status	ACTIVE

Lifecycle & Compliance

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

Cross-Reference Index

Part Number	Manufacturer
WM412A-112841 PRIMARY	Williams Controls Inc (USA)

Reference documents

Reference	Meaning
750-774	C/1 Advisory reference — outside the item-of-supply concept Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp.

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 4820-01-274-1720?

NSN 4820-01-274-1720 is a Valve,restrictor Check, manufactured by Williams Controls Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-274-1720?

NSN 4820-01-274-1720 has 1 manufacturer part number on file: WM412A-112841 (Williams Controls Inc).

Is NSN 4820-01-274-1720 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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