PartsTable TECHNICAL DATA SHEET

NSN 3040-01-309-1904Government record, cited

Shaft, Piston Mounting3040-01-309-1904

NSN 3040-01-309-1904 · NIIN 013091904 · Part number 2493739

Ontic Engineering & Manufacturing, Inc Dba Ontic Us · FSC 3040 — Miscellaneous Power Transmission Equipment · FSG 30 — Mechanical Power Transmission Equipment · CAGE 45934

Government record, cited

NSN 3040-01-309-1904 — this item is cataloged by the U.S. Government under National Stock Number 3040-01-309-1904. Manufacturer of record part number: 2493739.

Also searched as 3040-01-309-1904 · 3040013091904 · NIIN 013091904 · 01-309-1904 · FSC 3040 Miscellaneous Power Transmission Equipment · CAGE 45934 · 2493739

Nearby stock numbers ← 3040-01-309-1874 Shaft, Shouldered · 3040-01-309-2314 →

Features

Shaft,piston Mounting — FSC 3040
1 manufacturer part number on file
Manufacturer of record: Ontic Engineering & Manufacturing, Inc Dba Ontic Us

Identification

NSN: 3040-01-309-1904
NIIN: 013091904
FSC: 3040 — Miscellaneous Power Transmission Equipment
FSG: 30 — Mechanical Power Transmission Equipment
Primary part number: 2493739
Manufacturer: Ontic Engineering & Manufacturing, Inc Dba Ontic Us

General Description

The Shaft,piston Mounting, cataloged under National Stock Number 3040-01-309-1904, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Ontic Engineering & Manufacturing, Inc Dba Ontic Us. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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	3040-01-309-1904
Primary Part Number	2493739
Item Name	Shaft,piston Mounting
FSC / FSG	3040 / 30 — Miscellaneous Power Transmission Equipment
Manufacturer	Ontic Engineering & Manufacturing, Inc Dba Ontic Us
Status	ACTIVE

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
2493739	Ontic Engineering & Manufacturing, Inc Dba Ontic Us (USA)

Reference documents

Reference	Meaning
2493739	3/2 Design control — primary reference U.S. Government activity

No interchangeability data on file.

Other items in FSC 3040 — Miscellaneous Power Transmission Equipment

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

3040-00-001-0046

3040-00-001-0046 · Item name not on file

3040-00-001-0047

3040-00-001-0047 · Item name not on file

3040-00-001-0048

3040-00-001-0048 · Item name not on file

3040-00-001-0068

3040-00-001-0068 · Item name not on file

3040-00-001-0077

3040-00-001-0077 · Item name not on file

3040-00-001-0078

3040-00-001-0078 · Item name not on file

3040-00-001-0089

3040-00-001-0089 · Item name not on file

3040-00-001-1224

3040-00-001-1224 · Item name not on file

Frequently Asked Questions

What is NSN 3040-01-309-1904?

NSN 3040-01-309-1904 is a Shaft,piston Mounting, manufactured by Ontic Engineering & Manufacturing, Inc Dba Ontic Us, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.

What part numbers are listed for NSN 3040-01-309-1904?

NSN 3040-01-309-1904 has 1 manufacturer part number on file: 2493739 (Ontic Engineering & Manufacturing, Inc Dba Ontic Us).

What are the specifications of 2493739?

Key specifications for 2493739: End Item Identification: ENGINE MODEL T-404. 0 specifications are documented in the U.S. Government catalog.

Is NSN 3040-01-309-1904 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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