PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

3919-7Piston,dehydrator

Howell Laboratories Inc Dba Howell Laboratories Inc · NSN 4440-00-421-9580 · FSC 4440 · No Item Name Available
Verified by PartsTable
NSN 4440-00-421-9580 — this item is cataloged by the U.S. Government under National Stock Number 4440-00-421-9580. Primary manufacturer part number: 3919-7.
Features
  • Piston,dehydrator — FSC 4440
  • General Characteristics Item Description: BRASS AND RUBBER
  • 3 verified cross-references
  • Primary manufacturer: Howell Laboratories Inc Dba Howell Laboratories Inc
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Piston,dehydrator, cataloged under National Stock Number 4440-00-421-9580, is classified within Federal Supply Class 4440 (No Item Name Available) of the Furnace, Steam, Drying, Nuclear Reactors group. The primary manufacturer of record is Howell Laboratories Inc Dba Howell Laboratories Inc. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4440-00-421-9580
Primary Part Number3919-7
Item NamePiston,dehydrator
FSC / FSG4440 / 44 — No Item Name Available
ManufacturerHowell Laboratories Inc Dba Howell Laboratories Inc
StatusACTIVE
General Characteristics Item DescriptionBRASS AND RUBBER
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5950-00-021-80043919 INTERCHANGEABLE
Transformer,radio Frequency
Pulse Engineering Inc
5945-00-027-436539197 INTERCHANGEABLE
Relay,electromagnetic
Dictaphone Corporation
5910-00-101-5146 INTERCHANGEABLE
Capacitor,fixed,mica Dielectric
5945-00-251-7382A37392 INTERCHANGEABLE
Relay,electromagnetic
Te Connectivity Corporation
5355-00-355-95093919 INTERCHANGEABLE
Knob
Control Products Corporation
5342-00-406-7017039197 INTERCHANGEABLE
Clevis,diverter Doo
Allianz Sweeper Company
5915-00-523-1878S0-C-63420 INTERCHANGEABLE
Filter,band Pass
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
3040-00-546-09424448341 INTERCHANGEABLE
Shaft,shouldered
The Boeing Company
5950-00-645-1634710862 INTERCHANGEABLE
Transformer,power
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
6240-00-946-9637 INTERCHANGEABLE
Lamp,incandescent
Cross-Reference Index
Part NumberManufacturer
3919 Howell Laboratories Inc Dba Howell Laboratories Inc (USA)
3919-7 PRIMARY Howell Laboratories Inc Dba Howell Laboratories Inc (USA)
3919B7 Howell Laboratories Inc Dba Howell Laboratories Inc (USA)
Related Parts
5950-00-021-8004INTERCHANGEABLE
TRANSFORMER,RADIO FREQUENCY
3919
5945-00-027-4365INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
39197
5910-00-101-5146INTERCHANGEABLE
CAPACITOR,FIXED,MICA DIELECTRIC
5945-00-251-7382INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
A37392
5355-00-355-9509INTERCHANGEABLE
KNOB
3919
5342-00-406-7017INTERCHANGEABLE
CLEVIS,DIVERTER DOO
039197
5915-00-523-1878INTERCHANGEABLE
FILTER,BAND PASS
S0-C-63420
3040-00-546-0942INTERCHANGEABLE
SHAFT,SHOULDERED
4448341
5950-00-645-1634INTERCHANGEABLE
TRANSFORMER,POWER
710862
6240-00-946-9637INTERCHANGEABLE
LAMP,INCANDESCENT
6930-01-042-6739INTERCHANGEABLE
INTEGRATED CIRCUIT
C3919-5
5940-01-064-1564INTERCHANGEABLE
TERMINAL,STUD
913122-B

Frequently Asked Questions

What is NSN 4440-00-421-9580?

NSN 4440-00-421-9580 is a Piston,dehydrator, manufactured by Howell Laboratories Inc Dba Howell Laboratories Inc, classified under FSC 4440 (No Item Name Available). Status: active.

What are the part numbers for NSN 4440-00-421-9580?

NSN 4440-00-421-9580 has 3 cross-referenced part numbers: 3919 (Howell Laboratories Inc Dba Howell Laboratories Inc), 3919-7 (Howell Laboratories Inc Dba Howell Laboratories Inc), 3919B7 (Howell Laboratories Inc Dba Howell Laboratories Inc).

What NSN replaces 4440-00-421-9580?

There are 12 known substitutes for 4440-00-421-9580: 5950-00-021-8004, 5945-00-027-4365, 5910-00-101-5146 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 3919-7?

Key specifications for 3919-7: General Characteristics Item Description: BRASS AND RUBBER. 1 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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