Valve, Safety Relief 4820-01-026-0646 NSN 4820-01-026-0646 · NIIN 010260646 · Part number 3978-3SET12
Howell Laboratories Inc Dba Howell Laboratories Inc · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 22501
NSN 4820-01-026-0646 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-026-0646. Manufacturer of record part number: 3978-3SET12 .
Also searched as
4820-01-026-0646 ·
4820010260646 ·
NIIN 010260646 ·
01-026-0646 ·
FSC 4820 Valves, Nonpowered · CAGE 22501 · 3978-3SET12
Nearby stock numbers
← 4820-01-026-0556
·
4820-01-026-0679 →
4820-01-026-0646 — Valves, Nonpowered
Features
Valve,safety Relief — FSC 4820 1 manufacturer part number on file Manufacturer of record: Howell Laboratories Inc Dba Howell Laboratories Inc
Identification
NSN: 4820-01-026-0646
NIIN: 010260646
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 3978-3SET12
Manufacturer: Howell Laboratories Inc Dba Howell Laboratories Inc
General Description
The Valve,safety Relief, cataloged under National Stock Number 4820-01-026-0646, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Howell Laboratories Inc Dba Howell Laboratories Inc. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
Catalog Facts
Item Name Valve,safety Relief FSC / FSG 4820 — Valves, Nonpowered (FSG 48) Manufacturers Howell Laboratories Inc Dba Howell Laboratories Inc (CAGE 22501)
Technical Specifications
Parameter Value NSN 4820-01-026-0646 Primary Part Number 3978-3SET12 Item Name Valve,safety Relief FSC / FSG 4820 / 48 — Valves, Nonpowered Manufacturer Howell Laboratories Inc Dba Howell Laboratories Inc Status ACTIVE
Lifecycle & Compliance
Acquisition Status ACTIVE DEMIL Code DEMIL A — No Demilitarization Required Hazard No hazard code in the DLA record (HMIC N)
Cross-Reference Index
Part Number Manufacturer
3978-3SET12 PRIMARY Howell Laboratories Inc Dba Howell Laboratories Inc (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 4820-01-026-0646?
NSN 4820-01-026-0646 is a Valve,safety Relief, manufactured by Howell Laboratories Inc Dba Howell Laboratories Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-026-0646?
NSN 4820-01-026-0646 has 1 manufacturer part number on file: 3978-3SET12 (Howell Laboratories Inc Dba Howell Laboratories Inc).
Is NSN 4820-01-026-0646 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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