Valve, Safety Relief4820-01-486-9000

NSN 4820-01-486-9000 · NIIN 014869000 · Part number 9810-21-1197-18

The Entwistle Company Llc · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 20722

Government record, cited

NSN 4820-01-486-9000 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-486-9000. Manufacturer of record part number: 9810-21-1197-18.

Also searched as 4820-01-486-9000 · 4820014869000 · NIIN 014869000 · 01-486-9000 · FSC 4820 Valves, Nonpowered · CAGE 20722 · 9810-21-1197-18 · 9889K19

Nearby stock numbers ← 4820-01-486-8998 Valve, Safety Relief · 4820-01-486-9412 Valve, Tee →

4820-01-486-9000 — Valves, Nonpowered

Features

Valve,safety Relief — FSC 4820
Media for Which Designed: AIR SINGLE RESPONSE
2 manufacturer part numbers on file
Manufacturer of record: The Entwistle Company Llc

Identification

NSN: 4820-01-486-9000
NIIN: 014869000
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 9810-21-1197-18
Manufacturer: The Entwistle Company Llc

General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-01-486-9000, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is The Entwistle Company Llc. Government technical data includes 1 specification, 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	4820-01-486-9000
Primary Part Number	9810-21-1197-18
Item Name	Valve,safety Relief
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	The Entwistle Company Llc
Status	ACTIVE
Media for Which Designed	AIR SINGLE RESPONSE

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
9889K19	Mcmaster-Carr Supply Co (USA)
9810-21-1197-18 PRIMARY	The Entwistle Company Llc (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 4820-01-486-9000?

NSN 4820-01-486-9000 is a Valve,safety Relief, manufactured by The Entwistle Company Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-486-9000?

NSN 4820-01-486-9000 has 2 manufacturer part numbers on file: 9889K19 (Mcmaster-Carr Supply Co), 9810-21-1197-18 (The Entwistle Company Llc).

What are the specifications of 9810-21-1197-18?

Key specifications for 9810-21-1197-18: Special Features: ASME BRASS POP-SAFETY VALVE FOR AIR 1/4 INCH NPT MALE IN; Media for Which Designed: AIR SINGLE RESPONSE; End Item Identification: FLUSH CAPPING SYSTEM MIXER. 1 specification is documented in the U.S. Government catalog.

Is NSN 4820-01-486-9000 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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