PartsTable TECHNICAL DATA SHEET

NSN 3040-01-194-6747Government record, cited

Shaft, Shouldered3040-01-194-6747

NSN 3040-01-194-6747 · NIIN 011946747

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

Government record, cited

Also searched as 3040-01-194-6747 · 3040011946747 · NIIN 011946747 · 01-194-6747 · FSC 3040 Miscellaneous Power Transmission Equipment · SSN637-501-2143875 PIECE 29 · SSN637-501-2143875 · 77643-74 X 2 PIECE 29 · 77643-74 X 2

Nearby stock numbers ← 3040-01-194-6743 Shaft, Straight · 3040-01-194-6748 Shaft, Shouldered →

Features

Shaft,shouldered — FSC 3040
Surface Finish: 125.0 MICROINCHES
Step Quantity: 3
First End Diameter: 0.8750 INCHES NOMINAL IN
Largest Step Diameter: 1.247 INCHES MINIMUM AND 1.248 INCHES MAXIMUM IN
First End External Thread Length: 0.938 INCHES NOMINAL IN
First End Style: EXTERNAL THREADED
Material Document and Classification: QQ-N-281 CLASS A FED SPEC SINGLE MATERIAL RESPONSE

Identification

NSN: 3040-01-194-6747
NIIN: 011946747
FSC: 3040 — Miscellaneous Power Transmission Equipment
FSG: 30 — Mechanical Power Transmission Equipment

General Description

The Shaft,shouldered, cataloged under National Stock Number 3040-01-194-6747, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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	3040-01-194-6747
Item Name	Shaft,shouldered
FSC / FSG	3040 / 30 — Miscellaneous Power Transmission Equipment
Status	ACTIVE
Surface Finish	125.0 MICROINCHES
Step Quantity	3
First End Diameter	0.8750 INCHES NOMINAL IN
Largest Step Diameter	1.247 INCHES MINIMUM AND 1.248 INCHES MAXIMUM IN
First End External Thread Length	0.938 INCHES NOMINAL IN
First End Style	EXTERNAL THREADED
Material Document and Classification	QQ-N-281 CLASS A FED SPEC SINGLE MATERIAL RESPONSE
End Similarity	IDENTICAL
Material	NICKEL ALLOY

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

⇄ Related Items 5

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

3040-01-194-674877643-74 X 2 PIECE 30 POSSIBLE MATCH

SHAFT,SHOULDERED

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

3020-01-194-69652143875 PIECE 12 POSSIBLE MATCH

GEAR,SPUR

Possible match (shared part number)Naval Ship Systems Command

3020-01-194-696677643-74 X 2 PIECE 13 POSSIBLE MATCH

GEAR,SPUR

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

3040-01-194-787777643-74 X 2 PIECE 22 POSSIBLE MATCH

SHAFT,SHOULDERED

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

3040-01-194-787877643-74X2 PC 23 POSSIBLE MATCH

SHAFT,SHOULDERED

Possible match (shared part number)Swiss Precision Products, Inc. Dba Swiss Precision Products Inc

Cross-Reference Index

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

Reference documents

Reference	Meaning
SSN637-501-2143875 PIECE 29	5/2 Secondary reference U.S. Government activity
SSN637-501-2143875	D/9 Drawing number reference only U.S. Government activity
77643-74 X 2 PIECE 29	3/2 Design control — primary reference U.S. Government activity
77643-74 X 2	D/9 Drawing number reference only U.S. Government activity

Related Parts

3040-01-194-6748POSSIBLE MATCH

SHAFT,SHOULDERED

77643-74 X 2 PIECE 30

3020-01-194-6965POSSIBLE MATCH

GEAR,SPUR

2143875 PIECE 12

3020-01-194-6966POSSIBLE MATCH

GEAR,SPUR

77643-74 X 2 PIECE 13

3040-01-194-7877POSSIBLE MATCH

SHAFT,SHOULDERED

77643-74 X 2 PIECE 22

3040-01-194-7878POSSIBLE MATCH

SHAFT,SHOULDERED

77643-74X2 PC 23

Frequently Asked Questions

What is NSN 3040-01-194-6747?

NSN 3040-01-194-6747 is a Shaft,shouldered, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.

What NSN replaces 3040-01-194-6747?

5 possible matches (shared part number, not a government interchangeability claim): 3040-01-194-6748, 3020-01-194-6965, 3020-01-194-6966. Verify interchangeability with system specifications before substitution.

What are the specifications of 3040-01-194-6747?

Key specifications for 3040-01-194-6747: Surface Finish: 125.0 MICROINCHES; Step Quantity: 3; First End Diameter: 0.8750 INCHES NOMINAL IN; Largest Step Diameter: 1.247 INCHES MINIMUM AND 1.248 INCHES MAXIMUM IN. 9 specifications are documented in the U.S. Government catalog.

Is NSN 3040-01-194-6747 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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