Shaft, Shouldered3040-01-374-8541

NSN 3040-01-374-8541 · NIIN 013748541 · Part number 2478W298

Allied Defense Industries, Llc Dba Ams Distribution · FSC 3040 — Miscellaneous Power Transmission Equipment · FSG 30 — Mechanical Power Transmission Equipment · CAGE 0GD25

Government record, cited

NSN 3040-01-374-8541 — this item is cataloged by the U.S. Government under National Stock Number 3040-01-374-8541. Manufacturer of record part number: 2478W298.

Also searched as 3040-01-374-8541 · 3040013748541 · NIIN 013748541 · 01-374-8541 · FSC 3040 Miscellaneous Power Transmission Equipment · CAGE 0GD25 · 2478W298

Nearby stock numbers ← 3040-01-374-8540 Collar, Shaft · 3040-01-374-8593 Gearshaft, Spur →

Features

Shaft,shouldered — FSC 3040
Second End Flat Length: 1.1500 INCHES NOMINAL IN
Step Quantity: 2
First End Diameter: 0.2550 INCHES NOMINAL IN
Second End Diameter: 0.3739 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN
Largest Step Diameter: 0.374 INCHES NOMINAL IN
First End Style: PLAIN
Material Document and Classification: QQ-A-225/4(T6) FED SPEC SINGLE MATERIAL RESPONSE

Identification

NSN: 3040-01-374-8541
NIIN: 013748541
FSC: 3040 — Miscellaneous Power Transmission Equipment
FSG: 30 — Mechanical Power Transmission Equipment
Primary part number: 2478W298
Manufacturer: Allied Defense Industries, Llc Dba Ams Distribution

General Description

The Shaft,shouldered, cataloged under National Stock Number 3040-01-374-8541, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Allied Defense Industries, Llc Dba Ams Distribution. Government technical data includes 11 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	3040-01-374-8541
Primary Part Number	2478W298
Item Name	Shaft,shouldered
FSC / FSG	3040 / 30 — Miscellaneous Power Transmission Equipment
Manufacturer	Allied Defense Industries, Llc Dba Ams Distribution
Status	ACTIVE
Second End Flat Length	1.1500 INCHES NOMINAL IN
Step Quantity	2
First End Diameter	0.2550 INCHES NOMINAL IN
Second End Diameter	0.3739 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN
Largest Step Diameter	0.374 INCHES NOMINAL IN
First End Style	PLAIN
Material Document and Classification	QQ-A-225/4(T6) FED SPEC SINGLE MATERIAL RESPONSE
End Similarity	NOT IDENTICAL
Second End Style	FLATTED
Material	ALUMINUM ALLOY
Second End Flat Depth	0.0210 INCHES NOMINAL IN

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
2478W298 PRIMARY	Allied Defense Industries, Llc Dba Ams Distribution (USA)
2478W298	Honeywell Aerospace Yeovil Div Aerospace -Yeovil (GBR)

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 3040-01-374-8541?

NSN 3040-01-374-8541 is a Shaft,shouldered, manufactured by Allied Defense Industries, Llc Dba Ams Distribution, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.

What part numbers are listed for NSN 3040-01-374-8541?

NSN 3040-01-374-8541 has 2 manufacturer part numbers on file: 2478W298 (Allied Defense Industries, Llc Dba Ams Distribution), 2478W298 (Honeywell Aerospace Yeovil Div Aerospace -Yeovil).

What are the specifications of 2478W298?

Key specifications for 2478W298: Second End Flat Length: 1.1500 INCHES NOMINAL IN; Step Quantity: 2; First End Diameter: 0.2550 INCHES NOMINAL IN; Second End Diameter: 0.3739 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN. 11 specifications are documented in the U.S. Government catalog.

Is NSN 3040-01-374-8541 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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