PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet
MRO / Weapons / 1040-00-343-7978

1509-4Piston Assy,disc

Schlumberger Electricities Inc Dba Neptune Measure · NSN 1040-00-343-7978 · FSC 1040 · No Item Name Available
Verified by PartsTable
NSN 1040-00-343-7978 — this item is cataloged by the U.S. Government under National Stock Number 1040-00-343-7978. Primary manufacturer part number: 1509-4.
MRO FSG 10 NO ITEM NAME AVAILABLE Technical Drawing
1040-00-343-7978 — No Item Name Available illustration
Features
  • Piston Assy,disc — FSC 1040
  • 1 verified cross-reference
  • Primary manufacturer: Schlumberger Electricities Inc Dba Neptune Measure
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Piston Assy,disc, cataloged under National Stock Number 1040-00-343-7978, is classified within Federal Supply Class 1040 (No Item Name Available) of the Weapons group. The primary manufacturer of record is Schlumberger Electricities Inc Dba Neptune Measure. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NamePiston Assy,disc
FSC / FSG1040 — No Item Name Available (FSG 10)
ManufacturersSchlumberger Electricities Inc Dba Neptune Measure (CAGE 43249)
Technical Specifications
ParameterValue
NSN1040-00-343-7978
Primary Part Number1509-4
Item NamePiston Assy,disc
FSC / FSG1040 / 10 — No Item Name Available
ManufacturerSchlumberger Electricities Inc Dba Neptune Measure
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
⇄ Verified Substitutes 7
4720-00-289-5222 INTERCHANGEABLE
Hose,nonmetallic
5120-00-293-299915094 INTERCHANGEABLE
Face,hammer,inserted
Nupla Corporation
3110-00-554-3232204S INTERCHANGEABLE
Bearing,ball,annular
Skf Usa Inc.
5940-00-926-0035 INTERCHANGEABLE
Terminal,stud
5905-01-033-1928 INTERCHANGEABLE
Resistor,variable,nonwire Wound,
4510-01-295-256715094 INTERCHANGEABLE
Handle,faucet
Amerigas Inc Industrial Gases Div
4820-01-429-841315094-28 INTERCHANGEABLE
Disk,valve
Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division
Cross-Reference Index
Part NumberManufacturer
1509-4 PRIMARY Schlumberger Electricities Inc Dba Neptune Measure (USA)
Related Parts
4720-00-289-5222INTERCHANGEABLE
HOSE,NONMETALLIC
5120-00-293-2999INTERCHANGEABLE
FACE,HAMMER,INSERTED
15094
3110-00-554-3232INTERCHANGEABLE
BEARING,BALL,ANNULAR
204S
5940-00-926-0035INTERCHANGEABLE
TERMINAL,STUD
5905-01-033-1928INTERCHANGEABLE
RESISTOR,VARIABLE,NONWIRE WOUND,
4510-01-295-2567INTERCHANGEABLE
HANDLE,FAUCET
15094
4820-01-429-8413INTERCHANGEABLE
DISK,VALVE
15094-28

Frequently Asked Questions

What is NSN 1040-00-343-7978?

NSN 1040-00-343-7978 is a Piston Assy,disc, manufactured by Schlumberger Electricities Inc Dba Neptune Measure, classified under FSC 1040 (No Item Name Available). Status: active.

What are the part numbers for NSN 1040-00-343-7978?

NSN 1040-00-343-7978 has 1 cross-referenced part number: 1509-4 (Schlumberger Electricities Inc Dba Neptune Measure).

What NSN replaces 1040-00-343-7978?

There are 7 known substitutes for 1040-00-343-7978: 4720-00-289-5222, 5120-00-293-2999, 3110-00-554-3232 and 4 more. Verify interchangeability with system specifications before substitution.

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