Cap, Valve4820-01-185-2984

NSN 4820-01-185-2984 · NIIN 011852984 · Part number U539443

Triumph Thermal Systems, Llc · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 78943

Government record, cited

NSN 4820-01-185-2984 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-185-2984. Manufacturer of record part number: U539443.

Also searched as 4820-01-185-2984 · 4820011852984 · NIIN 011852984 · 01-185-2984 · FSC 4820 Valves, Nonpowered · CAGE 78943 · U539443

Nearby stock numbers ← 4820-01-185-2950 Valve, Regulating, Fluid Pressure · 4820-01-185-3160 Valve, Check →

4820-01-185-2984 — Valves, Nonpowered

Features

Cap,valve — FSC 4820
1 manufacturer part number on file
Manufacturer of record: Triumph Thermal Systems, Llc

Identification

NSN: 4820-01-185-2984
NIIN: 011852984
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: U539443
Manufacturer: Triumph Thermal Systems, Llc

General Description

The Cap,valve, cataloged under National Stock Number 4820-01-185-2984, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Triumph Thermal Systems, Llc. 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	4820-01-185-2984
Primary Part Number	U539443
Item Name	Cap,valve
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Triumph Thermal Systems, Llc
Status	ACTIVE

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
U539443 PRIMARY	Triumph Thermal Systems, 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 4820-01-185-2984?

NSN 4820-01-185-2984 is a Cap,valve, manufactured by Triumph Thermal Systems, Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-185-2984?

NSN 4820-01-185-2984 has 1 manufacturer part number on file: U539443 (Triumph Thermal Systems, Llc).

What are the specifications of U539443?

Key specifications for U539443: Special Features: CRES STEEL 17-4 PH PER AMS 5643; 2.400 IN. LG; BORED ONE END 0.700 IN. DIA 0.820 IN. DEEP; BORED OPPOSITE END 0.258 IN. DIA 1.110 IN. DEEP; LARGESTOD 1.280 IN.; USED ON U539435 IN; End Item Identification: B-1B. 0 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-185-2984 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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