NSN 3040-01-120-8285 · NIIN 011208285 · Part number 709-4684875 ITEM 15
Naval Sea Systems Command · FSC 3040 — Miscellaneous Power Transmission Equipment · FSG 30 — Mechanical Power Transmission Equipment · CAGE 53711
Government record, cited
NSN 3040-01-120-8285 — this item is cataloged by the U.S. Government under National Stock Number 3040-01-120-8285. Manufacturer of record part number: 709-4684875 ITEM 15.
First End Diameter: 0.9842 INCHES MINIMUM AND 0.9846 INCHES MAXIMUM IN
Largest Step Diameter: 1.200 INCHES NOMINAL IN
First End Style: CIRCULAR GROOVED
Material Document and Classification: MIL-S-1222,TYPE 1 MIL SPEC SINGLE MATERIAL RESPONSE
End Similarity: IDENTICAL
Identification
NSN: 3040-01-120-8285
NIIN: 011208285
FSC: 3040 — Miscellaneous Power Transmission Equipment
FSG: 30 — Mechanical Power Transmission Equipment
Primary part number: 709-4684875 ITEM 15
Manufacturer: Naval Sea Systems Command
General Description
The Shaft,shouldered, cataloged under National Stock Number 3040-01-120-8285, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 11 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 8 items share a part number with this NSN in the catalog (possible match — not a government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
3040-01-120-8285
Primary Part Number
709-4684875 ITEM 15
Item Name
Shaft,shouldered
FSC / FSG
3040 / 30 — Miscellaneous Power Transmission Equipment
Manufacturer
Naval Sea Systems Command
Status
ACTIVE
Surface Finish
32.0 MICROINCHES
Step Quantity
4
First End Diameter
0.9842 INCHES MINIMUM AND 0.9846 INCHES MAXIMUM IN
Largest Step Diameter
1.200 INCHES NOMINAL IN
First End Style
CIRCULAR GROOVED
Material Document and Classification
MIL-S-1222,TYPE 1 MIL SPEC SINGLE MATERIAL RESPONSE
End Similarity
IDENTICAL
First End Distance From End to Groove
0.090 INCHES NOMINAL IN
First End Groove Diameter
0.9350 INCHES MINIMUM AND 0.9390 INCHES MAXIMUM IN
Material
STEEL
First End Groove Width
0.0860 INCHES MINIMUM AND 0.0910 INCHES MAXIMUM 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
⇄Related Items8
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5340-01-121-045787832-1604 ITEM 6POSSIBLE MATCH
COVER,ACCESS
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
3040-01-130-2234709-4684875 ITEM 12POSSIBLE MATCH
SHAFT,STRAIGHT
Possible match (shared part number)Naval Ship Systems Command
5365-01-132-7151709-4684875 ITEM 34POSSIBLE MATCH
SPACER,SLEEVE
Possible match (shared part number)Naval Ship Systems Command
5340-01-153-1527709-4684875 ITEM 33POSSIBLE MATCH
BRACKET,LOCK PLATE
Possible match (shared part number)Naval Ship Systems Command
3040-01-177-242987832-1604 ITEM 2 AND ITEM 19POSSIBLE MATCH
HOUSING,MECHANICAL DRIVE
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
3040-01-177-474587832-1604 ITEM 16POSSIBLE MATCH
SHAFT,SHOULDERED
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
3040-01-182-684487832-1604POSSIBLE MATCH
SHAFT,SHOULDERED
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
3010-01-211-95244684875-0001POSSIBLE MATCH
GEAR ASSEMBLY,SPEED DECREASER
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
NSN 3040-01-120-8285 is a Shaft,shouldered, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
What part numbers are listed for NSN 3040-01-120-8285?
NSN 3040-01-120-8285 has 1 manufacturer part number on file: 709-4684875 ITEM 15 (Naval Sea Systems Command).
What NSN replaces 3040-01-120-8285?
8 possible matches (shared part number, not a government interchangeability claim): 5340-01-121-0457, 3040-01-130-2234, 5365-01-132-7151. Verify interchangeability with system specifications before substitution.
What are the specifications of 709-4684875 ITEM 15?
Key specifications for 709-4684875 ITEM 15: Surface Finish: 32.0 MICROINCHES; Step Quantity: 4; First End Diameter: 0.9842 INCHES MINIMUM AND 0.9846 INCHES MAXIMUM IN; Largest Step Diameter: 1.200 INCHES NOMINAL IN. 11 specifications are documented in the U.S. Government catalog.
Is NSN 3040-01-120-8285 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.