PartsTable TECHNICAL DATA SHEET

NSN 3040-01-123-3124Government record, cited

Gearshaft, Spur3040-01-123-3124

NSN 3040-01-123-3124 · NIIN 011233124

FSC 3040 — Miscellaneous Power Transmission Equipment · FSG 30 — Mechanical Power Transmission Equipment

Government record, cited

Also searched as 3040-01-123-3124 · 3040011233124 · NIIN 011233124 · 01-123-3124 · FSC 3040 Miscellaneous Power Transmission Equipment · 300-4684422 ITEM 4 · 522-4675675 · 522-4675675 ITEM 4 · 87643-6903 ITEM 4

Nearby stock numbers ← 3040-01-123-3095 · 3040-01-123-3567 Collar, Shaft →

Features

Gearshaft,spur — FSC 3040
Shaft Type: SHOULDERED
Shaft Material: STEEL
Shaft Largest Diameter: 1.260 INCHES NOMINAL IN
Shaft End Size: 0.998 INCHES IN
Teeth Quantity: 16
Diametral Pitch: 6
Gear Outside Diameter: 2.000 INCHES NOMINAL IN

Identification

NSN: 3040-01-123-3124
NIIN: 011233124
FSC: 3040 — Miscellaneous Power Transmission Equipment
FSG: 30 — Mechanical Power Transmission Equipment

General Description

The Gearshaft,spur, cataloged under National Stock Number 3040-01-123-3124, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 13 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	3040-01-123-3124
Item Name	Gearshaft,spur
FSC / FSG	3040 / 30 — Miscellaneous Power Transmission Equipment
Status	ACTIVE
Shaft Type	SHOULDERED
Shaft Material	STEEL
Shaft Largest Diameter	1.260 INCHES NOMINAL IN
Shaft End Size	0.998 INCHES IN
Teeth Quantity	16
Diametral Pitch	6
Gear Outside Diameter	2.000 INCHES NOMINAL IN
Longer Shaft Segment Length	3.821 INCHES NOMINAL IN
Gear Material	STEEL
Shaft End Type	SPLINED STRAIGHT AND CROSS DRILLED PARTIAL
Gear Location on Shaft	OFF CENTER BETWEEN ENDS OF SHAFT
Pressure Angle	20.0000 DEGREES
Face Width	1.100 INCHES NOMINAL IN

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL Q — CCL Item — Commerce Control List
Hazard	No hazard code in the DLA record (HMIC N)
Criticality Code	X

⇄ Related Items 6

Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.

3020-01-124-751187643-6903ITEM5 POSSIBLE MATCH

GEAR,SPUR

Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat

4820-01-158-8622522-4675675 ITEM10,11 POSSIBLE MATCH

CROSS SLIDE,UPPER,OPERATOR,VALVE

Possible match (shared part number)Naval Ship Systems Command

3040-01-182-7874522-4675675ITEM3 POSSIBLE MATCH

GEARSHAFT,SPUR

Possible match (shared part number)Naval Sea Systems Command

3020-01-183-4774522-4675675ITEM2 POSSIBLE MATCH

GEAR,BEVEL

Possible match (shared part number)Naval Sea Systems Command

3020-01-247-26384675675-0021 POSSIBLE MATCH

GEAR,BEVEL

Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat

3040-01-248-728087643-6903 ITEM 3 POSSIBLE MATCH

GEARSHAFT,SPUR

Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat

Cross-Reference Index

No manufacturer part numbers on file in the U.S. Government catalog.

Reference documents

Reference	Meaning
300-4684422 ITEM 4	3/2 Design control — primary reference U.S. Government activity
522-4675675	D/9 Drawing number reference only U.S. Government activity
522-4675675 ITEM 4	3/2 Design control — primary reference U.S. Government activity
87643-6903 ITEM 4	3/2 Design control — primary reference U.S. Government activity

Related Parts

3020-01-124-7511POSSIBLE MATCH

GEAR,SPUR

87643-6903ITEM5

4820-01-158-8622POSSIBLE MATCH

CROSS SLIDE,UPPER,OPERATOR,VALVE

522-4675675 ITEM10,11

3040-01-182-7874POSSIBLE MATCH

GEARSHAFT,SPUR

522-4675675ITEM3

3020-01-183-4774POSSIBLE MATCH

GEAR,BEVEL

522-4675675ITEM2

3020-01-247-2638POSSIBLE MATCH

GEAR,BEVEL

4675675-0021

3040-01-248-7280POSSIBLE MATCH

GEARSHAFT,SPUR

87643-6903 ITEM 3

Frequently Asked Questions

What is NSN 3040-01-123-3124?

NSN 3040-01-123-3124 is a Gearshaft,spur, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.

What NSN replaces 3040-01-123-3124?

6 possible matches (shared part number, not a government interchangeability claim): 3020-01-124-7511, 4820-01-158-8622, 3040-01-182-7874. Verify interchangeability with system specifications before substitution.

What are the specifications of 3040-01-123-3124?

Key specifications for 3040-01-123-3124: Shaft Type: SHOULDERED; Shaft Material: STEEL; Shaft Largest Diameter: 1.260 INCHES NOMINAL IN; Shaft End Size: 0.998 INCHES IN. 13 specifications are documented in the U.S. Government catalog.

Is NSN 3040-01-123-3124 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.

What is the DEMIL code for NSN 3040-01-123-3124?

NSN 3040-01-123-3124 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.

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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