PartsTable TECHNICAL DATA SHEET

NSN 4820-01-083-4271Government record, cited

Element Assembly, Thermostatic, VA4820-01-083-4271

NSN 4820-01-083-4271 · NIIN 010834271 · Part number 640078-7

Navantia - Propulsion Y Energia Motores - Cartagena · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 409BB

Government record, cited

NSN 4820-01-083-4271 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-083-4271. Manufacturer of record part number: 640078-7.

Also searched as 4820-01-083-4271 · 4820010834271 · NIIN 010834271 · 01-083-4271 · FSC 4820 Valves, Nonpowered · CAGE 409BB · 640078-7 · 1096X110

Nearby stock numbers ← 4820-01-083-4259 · 4820-01-083-4286 Stem, Fluid Valve →

4820-01-083-4271 — Valves, Nonpowered

Features

Element Assembly,thermostatic,va — FSC 4820
General Characteristics Item Description: BRONZE; SPRING ACTUATED; W/SLIDING VALVE; 110 DEGREES F OPERATING TEMP; BASIC MODEL NO. 2-1/2B; O-RING NO. 1183; HOUSING GASKET NO. 1094
1 manufacturer part number on file
Manufacturer of record: Navantia - Propulsion Y Energia Motores - Cartagena

Identification

NSN: 4820-01-083-4271
NIIN: 010834271
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 640078-7
Manufacturer: Navantia - Propulsion Y Energia Motores - Cartagena

General Description

The Element Assembly,thermostatic,va, cataloged under National Stock Number 4820-01-083-4271, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Navantia - Propulsion Y Energia Motores - Cartagena. Government technical data includes 1 specification, cited from the U.S. Government catalog. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.

Technical Specifications

Parameter	Value
NSN	4820-01-083-4271
Primary Part Number	640078-7
Item Name	Element Assembly,thermostatic,va
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Navantia - Propulsion Y Energia Motores - Cartagena
Status	ACTIVE
General Characteristics Item Description	BRONZE; SPRING ACTUATED; W/SLIDING VALVE; 110 DEGREES F OPERATING TEMP; BASIC MODEL NO. 2-1/2B; O-RING NO. 1183; HOUSING GASKET NO. 1094

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
640078-7	Navantia - Propulsion Y Energia Motores - Cartagena (ESP)

Reference documents

Reference	Meaning
1096X110	3/2 Design control — primary 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 4820-01-083-4271?

NSN 4820-01-083-4271 is a Element Assembly,thermostatic,va, manufactured by Navantia - Propulsion Y Energia Motores - Cartagena, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-083-4271?

NSN 4820-01-083-4271 has 1 manufacturer part number on file: 640078-7 (Navantia - Propulsion Y Energia Motores - Cartagena).

What are the specifications of 640078-7?

Key specifications for 640078-7: General Characteristics Item Description: BRONZE; SPRING ACTUATED; W/SLIDING VALVE; 110 DEGREES F OPERATING TEMP; BASIC MODEL NO. 2-1/2B; O-RING NO. 1183; HOUSING GASKET NO. 1094. 1 specification is documented in the U.S. Government catalog.

Is NSN 4820-01-083-4271 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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