NSN 4820-01-644-3525 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-644-3525. Manufacturer of record part number: AN 1000079820.
Also searched as4820-01-644-3525 ·
4820016443525 ·
NIIN 016443525 ·
01-644-3525 ·
FSC 4820 Valves, Nonpowered · CAGE 7JYX1 · AN 1000079820
Manufacturer of record: Hdt Expeditionary Systems, Inc. Dba Hdt Tactical Systems Inc
Identification
NSN: 4820-01-644-3525
NIIN: 016443525
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: AN 1000079820
Manufacturer: Hdt Expeditionary Systems, Inc. Dba Hdt Tactical Systems Inc
General Description
The Valve,safety Relief, cataloged under National Stock Number 4820-01-644-3525, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Hdt Expeditionary Systems, Inc. Dba Hdt Tactical Systems 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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
Valve,safety Relief
FSC / FSG
4820 — Valves, Nonpowered (FSG 48)
Manufacturers
Hdt Expeditionary Systems, Inc. Dba Hdt Tactical Systems Inc (CAGE 7JYX1)
Technical Specifications
Parameter
Value
NSN
4820-01-644-3525
Primary Part Number
AN 1000079820
Item Name
Valve,safety Relief
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Hdt Expeditionary Systems, Inc. Dba Hdt Tactical Systems Inc
Hdt Expeditionary Systems, Inc. Dba Hdt Tactical Systems Inc (USA)
Reference documents
Reference
Meaning
AN 1000079820
3/9Design control — primary reference
Hdt Expeditionary Systems, Inc.
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 4820-01-644-3525?
NSN 4820-01-644-3525 is a Valve,safety Relief, manufactured by Hdt Expeditionary Systems, Inc. Dba Hdt Tactical Systems Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-644-3525?
NSN 4820-01-644-3525 has 1 manufacturer part number on file: AN 1000079820 (Hdt Expeditionary Systems, Inc. Dba Hdt Tactical Systems Inc).
Is NSN 4820-01-644-3525 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.