NSN 3040-01-122-9875 · NIIN 011229875 · Part number 520-4674729 ITEM 12
Naval Sea Systems Command · FSC 3040 — Miscellaneous Power Transmission Equipment · FSG 30 — Mechanical Power Transmission Equipment · CAGE 53711
Government record, cited
NSN 3040-01-122-9875 — this item is cataloged by the U.S. Government under National Stock Number 3040-01-122-9875. Manufacturer of record part number: 520-4674729 ITEM 12.
Material Document and Classification: QQ-N-281 CL A FED SPEC SINGLE MATERIAL RESPONSE
End Similarity: IDENTICAL
Material: NICKEL ALLOY
1 manufacturer part number on file
Manufacturer of record: Naval Sea Systems Command
Identification
NSN: 3040-01-122-9875
NIIN: 011229875
FSC: 3040 — Miscellaneous Power Transmission Equipment
FSG: 30 — Mechanical Power Transmission Equipment
Primary part number: 520-4674729 ITEM 12
Manufacturer: Naval Sea Systems Command
General Description
The Shaft,straight, cataloged under National Stock Number 3040-01-122-9875, 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 5 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 7 items share a part number with this NSN in the catalog (possible match — not a government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
3040-01-122-9875
Primary Part Number
520-4674729 ITEM 12
Item Name
Shaft,straight
FSC / FSG
3040 / 30 — Miscellaneous Power Transmission Equipment
Manufacturer
Naval Sea Systems Command
Status
ACTIVE
First End Diameter
0.7500 INCHES NOMINAL IN
First End Style
PLAIN
Material Document and Classification
QQ-N-281 CL 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 Items7
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
3040-01-123-301487615-2011 ITEM 3POSSIBLE MATCH
SHAFT,SHOULDERED
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
2520-01-123-323887615-2011 ITEM 11POSSIBLE MATCH
UNIVERSAL JOINT,VEHICULAR
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
3040-01-123-3845520-4674729 ITEM 4POSSIBLE MATCH
COLLAR,SHAFT
Possible match (shared part number)Naval Ship Systems Command
2520-01-123-410287615-2011 ITEM 13POSSIBLE MATCH
UNIVERSAL JOINT,VEHICULAR
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
3040-01-123-884487615-2011 ITEM 2POSSIBLE MATCH
SHAFT,SHOULDERED
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
3040-01-124-3788520-4674729 ITEM 7POSSIBLE MATCH
COLLAR,SHAFT
Possible match (shared part number)Naval Ship Systems Command
2520-01-125-166287615-2011 ITEM 10POSSIBLE MATCH
UNIVERSAL JOINT,VEHICULAR
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
NSN 3040-01-122-9875 is a Shaft,straight, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
What part numbers are listed for NSN 3040-01-122-9875?
NSN 3040-01-122-9875 has 1 manufacturer part number on file: 520-4674729 ITEM 12 (Naval Sea Systems Command).
What NSN replaces 3040-01-122-9875?
7 possible matches (shared part number, not a government interchangeability claim): 3040-01-123-3014, 2520-01-123-3238, 3040-01-123-3845. Verify interchangeability with system specifications before substitution.
What are the specifications of 520-4674729 ITEM 12?
Key specifications for 520-4674729 ITEM 12: First End Diameter: 0.7500 INCHES NOMINAL IN; First End Style: PLAIN; Material Document and Classification: QQ-N-281 CL A FED SPEC SINGLE MATERIAL RESPONSE; Overall Length: 0.750 INCHES NOMINAL IN. 5 specifications are documented in the U.S. Government catalog.
Is NSN 3040-01-122-9875 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.