First End Width Across Flats: 0.621 INCHES MINIMUM AND 0.623 INCHES MAXIMUM IN
Second End Angle Between Holes: 90.0 DEGREES NOMINAL
Second End Hole Diameter: 0.2810 INCHES NOMINAL IN
Second End Hole Diameter: 0.2500 INCHES NOMINAL IN
Step Quantity: 2
First End Diameter: 0.7470 INCHES MINIMUM AND 0.7490 INCHES MAXIMUM IN
Identification
NSN: 3040-01-123-3015
NIIN: 011233015
FSC: 3040 — Miscellaneous Power Transmission Equipment
FSG: 30 — Mechanical Power Transmission Equipment
General Description
The Shaft,shouldered, cataloged under National Stock Number 3040-01-123-3015, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 17 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 8 items share a part number with this NSN in the catalog (possible match — not a government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
3040-01-123-3015
Item Name
Shaft,shouldered
FSC / FSG
3040 / 30 — Miscellaneous Power Transmission Equipment
Status
ACTIVE
Surface Finish
63.0 MICROINCHES
First End Width Across Flats
0.621 INCHES MINIMUM AND 0.623 INCHES MAXIMUM IN
Second End Angle Between Holes
90.0 DEGREES NOMINAL
Second End Hole Diameter
0.2810 INCHES NOMINAL IN
Second End Hole Diameter
0.2500 INCHES NOMINAL IN
Step Quantity
2
First End Diameter
0.7470 INCHES MINIMUM AND 0.7490 INCHES MAXIMUM IN
First End Step Length
1.250 INCHES NOMINAL IN
Second End Diameter
1.5000 INCHES NOMINAL IN
Largest Step Diameter
1.500 INCHES NOMINAL IN
First End Style
SQUARE (ROUND CORNERS)
Material Document and Classification
QQ-S-769,COND B FED SPEC SINGLE MATERIAL RESPONSE
Second End Distance From Hole Center to End
1.440 INCHES NOMINAL IN
End Similarity
NOT IDENTICAL
Second End Style
TWO CROSS DRILLED HOLES
Material
STEEL COMP 304
Second End Distance Between Hole Centers
0.560 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 Items8
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
3010-01-123-410387832-1651 ITEM 28POSSIBLE MATCH
COUPLING,SHAFT,RIGID
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
3040-01-124-378987832-1651 ITEM 39POSSIBLE MATCH
SHAFT,STRAIGHT
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
3010-01-124-392687832-1651 ITEM 30POSSIBLE MATCH
COUPLING,SHAFT,RIGID
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
3040-01-151-5633709-4684922 ITEM 35POSSIBLE MATCH
SHAFT,STRAIGHT
Possible match (shared part number)Naval Sea Systems Command
3040-01-152-3065709-4684922 ITEM 9POSSIBLE MATCH
SHAFT,SHOULDERED
Possible match (shared part number)Naval Sea Systems Command
3040-01-154-637787832-1651 ITEM 11POSSIBLE MATCH
SHAFT,SHOULDERED
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
3020-01-154-638087832-1651 ITEM 48POSSIBLE MATCH
CHAIN,ROLLER
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
2520-01-155-802787832-1651 ITEM 31POSSIBLE MATCH
UNIVERSAL JOINT,VEHICULAR
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
87832-1651
D/9Drawing number reference only
U.S. Government activity
709-4684922 ITEM 10
5/2Secondary reference
U.S. Government activity
709-4684922
D/9Drawing number reference only
U.S. Government activity
87832-1651 ITEM 10
3/2Design control — primary reference
U.S. Government activity
Related Parts
3010-01-123-4103POSSIBLE MATCH
COUPLING,SHAFT,RIGID
87832-1651 ITEM 28
3040-01-124-3789POSSIBLE MATCH
SHAFT,STRAIGHT
87832-1651 ITEM 39
3010-01-124-3926POSSIBLE MATCH
COUPLING,SHAFT,RIGID
87832-1651 ITEM 30
3040-01-151-5633POSSIBLE MATCH
SHAFT,STRAIGHT
709-4684922 ITEM 35
3040-01-152-3065POSSIBLE MATCH
SHAFT,SHOULDERED
709-4684922 ITEM 9
3040-01-154-6377POSSIBLE MATCH
SHAFT,SHOULDERED
87832-1651 ITEM 11
3020-01-154-6380POSSIBLE MATCH
CHAIN,ROLLER
87832-1651 ITEM 48
2520-01-155-8027POSSIBLE MATCH
UNIVERSAL JOINT,VEHICULAR
87832-1651 ITEM 31
Frequently Asked Questions
What is NSN 3040-01-123-3015?
NSN 3040-01-123-3015 is a Shaft,shouldered, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
What NSN replaces 3040-01-123-3015?
8 possible matches (shared part number, not a government interchangeability claim): 3010-01-123-4103, 3040-01-124-3789, 3010-01-124-3926. Verify interchangeability with system specifications before substitution.
What are the specifications of 3040-01-123-3015?
Key specifications for 3040-01-123-3015: Surface Finish: 63.0 MICROINCHES; First End Width Across Flats: 0.621 INCHES MINIMUM AND 0.623 INCHES MAXIMUM IN; Second End Angle Between Holes: 90.0 DEGREES NOMINAL; Second End Hole Diameter: 0.2810 INCHES NOMINAL IN. 17 specifications are documented in the U.S. Government catalog.
Is NSN 3040-01-123-3015 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 3040-01-123-3015?
NSN 3040-01-123-3015 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.