Parts Kit, Vent Valve4820-01-133-5989

NSN 4820-01-133-5989 · NIIN 011335989 · Part number 1949-K-500-RK-21A

Wheeler Fleet Solutions, Co. · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 55683

Government record, cited

NSN 4820-01-133-5989 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-133-5989. Manufacturer of record part number: 1949-K-500-RK-21A.

Also searched as 4820-01-133-5989 · 4820011335989 · NIIN 011335989 · 01-133-5989 · FSC 4820 Valves, Nonpowered · CAGE 55683 · 1949-K-500-RK-21A · K-500-RK-21A

Nearby stock numbers ← 4820-01-133-5980 Valve, Safety Relief · 4820-01-133-5991 Valve, Flow Control →

4820-01-133-5989 — Valves, Nonpowered

Features

Parts Kit,vent Valve — FSC 4820
Component Quantity: 4
Supply Items and Quantities: SPRING 1;DIAPHRAGM 1;RING,WEAR 1;PIN,DRIV-LOK 1
2 manufacturer part numbers on file
Manufacturer of record: Wheeler Fleet Solutions, Co.

Identification

NSN: 4820-01-133-5989
NIIN: 011335989
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 1949-K-500-RK-21A
Manufacturer: Wheeler Fleet Solutions, Co.

General Description

The Parts Kit,vent Valve, cataloged under National Stock Number 4820-01-133-5989, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Wheeler Fleet Solutions, Co.. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4820-01-133-5989
Primary Part Number	1949-K-500-RK-21A
Item Name	Parts Kit,vent Valve
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Wheeler Fleet Solutions, Co.
Status	ACTIVE
Component Quantity	4
Supply Items and Quantities	SPRING 1;DIAPHRAGM 1;RING,WEAR 1;PIN,DRIV-LOK 1

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
1949-K-500-RK-21A PRIMARY	Wheeler Fleet Solutions, Co. (USA)
K-500-RK-21A PRIMARY	Kovatch Corp. (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 4820-01-133-5989?

NSN 4820-01-133-5989 is a Parts Kit,vent Valve, manufactured by Wheeler Fleet Solutions, Co., classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-133-5989?

NSN 4820-01-133-5989 has 2 manufacturer part numbers on file: 1949-K-500-RK-21A (Wheeler Fleet Solutions, Co.), K-500-RK-21A (Kovatch Corp.).

What are the specifications of 1949-K-500-RK-21A?

Key specifications for 1949-K-500-RK-21A: Component Quantity: 4; Supply Items and Quantities: SPRING 1;DIAPHRAGM 1;RING,WEAR 1;PIN,DRIV-LOK 1. 2 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-133-5989 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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