PartsTable TECHNICAL DATA SHEET

NSN 4820-00-869-1891Government record, cited

Piston, Valve4820-00-869-1891

NSN 4820-00-869-1891 · NIIN 008691891 · Part number HP850120

Tactair Fluid Controls Inc · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 70236

Government record, cited

NSN 4820-00-869-1891 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-869-1891. Manufacturer of record part number: HP850120.

Also searched as 4820-00-869-1891 · 4820008691891 · NIIN 008691891 · 00-869-1891 · FSC 4820 Valves, Nonpowered · CAGE 70236 · HP850120

Nearby stock numbers ← 4820-00-869-1889 Sleeve and Slide, Directional Con · 4820-00-869-1900 Valve, Plug →

4820-00-869-1891 — Valves, Nonpowered

Features

Piston,valve — FSC 4820
1 manufacturer part number on file
Manufacturer of record: Tactair Fluid Controls Inc

Identification

NSN: 4820-00-869-1891
NIIN: 008691891
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: HP850120
Manufacturer: Tactair Fluid Controls Inc

General Description

The Piston,valve, cataloged under National Stock Number 4820-00-869-1891, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Tactair Fluid 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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	Piston,valve
FSC / FSG	4820 — Valves, Nonpowered (FSG 48)
Manufacturers	Tactair Fluid Controls Inc (CAGE 70236)

Technical Specifications

Parameter	Value
NSN	4820-00-869-1891
Primary Part Number	HP850120
Item Name	Piston,valve
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Tactair Fluid Controls Inc
Status	ACTIVE

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL B — Remove Demilitarization Key Points
Hazard	No hazard code in the DLA record (HMIC N)
Criticality Code	X

Cross-Reference Index

Part Number	Manufacturer
HP850120 PRIMARY	Tactair Fluid Controls Inc (USA)

Reference documents

Reference	Meaning
HP850120	5/9 Secondary 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 4820-00-869-1891?

NSN 4820-00-869-1891 is a Piston,valve, manufactured by Tactair Fluid Controls Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-00-869-1891?

NSN 4820-00-869-1891 has 1 manufacturer part number on file: HP850120 (Tactair Fluid Controls Inc).

Is NSN 4820-00-869-1891 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.

What is the DEMIL code for NSN 4820-00-869-1891?

NSN 4820-00-869-1891 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.

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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