NSN 3040-01-495-5581 · NIIN 014955581 · Part number 581-6985419-7
Naval Sea Systems Command · FSC 3040 — Miscellaneous Power Transmission Equipment · FSG 30 — Mechanical Power Transmission Equipment · CAGE 53711
Government record, cited
NSN 3040-01-495-5581 — this item is cataloged by the U.S. Government under National Stock Number 3040-01-495-5581. Manufacturer of record part number: 581-6985419-7.
Also searched as3040-01-495-5581 ·
3040014955581 ·
NIIN 014955581 ·
01-495-5581 ·
FSC 3040 Miscellaneous Power Transmission Equipment · CAGE 53711 · 581-6985419-7 · H611-1403 · H611-1403-7 · 581-6985419
Nearby stock numbers← 3040-01-495-5548 Hub, Body
·
3040-01-495-5631 Brake Band, Power Transmission Eq →
Features
Shaft,shouldered — FSC 3040
Surface Finish: 32.0 MICROINCHES
Step Quantity: 4
First End Diameter: 3.7480 INCHES MINIMUM AND 3.7500 INCHES MAXIMUM IN
Second End Diameter: 3.4930 INCHES MINIMUM AND 3.4950 INCHES MAXIMUM IN
Largest Step Diameter: 4.493 INCHES MINIMUM AND 4.495 INCHES MAXIMUM IN
Second End Spline Minor Diameter: 2.9980 INCHES MINIMUM AND 3.0020 INCHES MAXIMUM IN
First End Style: PLAIN
Identification
NSN: 3040-01-495-5581
NIIN: 014955581
FSC: 3040 — Miscellaneous Power Transmission Equipment
FSG: 30 — Mechanical Power Transmission Equipment
Primary part number: 581-6985419-7
Manufacturer: Naval Sea Systems Command
General Description
The Shaft,shouldered, cataloged under National Stock Number 3040-01-495-5581, 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 14 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 11 items share a part number with this NSN in the catalog (possible match — not a government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
3040-01-495-5581
Primary Part Number
581-6985419-7
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
3.7480 INCHES MINIMUM AND 3.7500 INCHES MAXIMUM IN
Second End Diameter
3.4930 INCHES MINIMUM AND 3.4950 INCHES MAXIMUM IN
Largest Step Diameter
4.493 INCHES MINIMUM AND 4.495 INCHES MAXIMUM IN
Second End Spline Minor Diameter
2.9980 INCHES MINIMUM AND 3.0020 INCHES MAXIMUM IN
First End Style
PLAIN
Second End Spline Major Diameter
3.4930 INCHES MINIMUM AND 3.4950 INCHES MAXIMUM IN
Material Document and Classification
QQ-N-286, FORM 2 FED SPEC SINGLE MATERIAL RESPONSE
End Similarity
NOT IDENTICAL
Second End Spline Quantity
10
Second End Style
SPLINED (STRAIGHT)
Material
NICKEL ALLOY K-500
Second End Spline Length
5.875 INCHES NOMINAL 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 Items11
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
3040-01-495-5631581-6985419-33POSSIBLE MATCH
BRAKE BAND,POWER TRANSMISSION EQ
Possible match (shared part number)Naval Sea Systems Command
3950-01-495-6394581-6985419-6POSSIBLE MATCH
PULLEY,WHELPED GROOVE
Possible match (shared part number)Naval Sea Systems Command
3950-01-495-7606581-6985419-A1POSSIBLE MATCH
WINDLASS
Possible match (shared part number)Naval Sea Systems Command
3120-01-495-8562581-6985419-5POSSIBLE MATCH
BUSHING,SLEEVE
Possible match (shared part number)Naval Sea Systems Command
3120-01-495-8565581-6985419-1POSSIBLE MATCH
BUSHING,SLEEVE
Possible match (shared part number)Naval Sea Systems Command
3120-01-495-8569581-6985419-9POSSIBLE MATCH
BEARING,WASHER,THRUST
Possible match (shared part number)Naval Sea Systems Command
3120-01-495-8570581-6985419-10POSSIBLE MATCH
BEARING,WASHER,THRUST
Possible match (shared part number)Naval Sea Systems Command
3120-01-495-8708581-6985419-70POSSIBLE MATCH
BUSHING,SLEEVE
Possible match (shared part number)Naval Sea Systems Command
3120-01-495-8709581-6985419-71POSSIBLE MATCH
BUSHING,SLEEVE
Possible match (shared part number)Naval Sea Systems Command
3120-01-496-1356581-6985419-90POSSIBLE MATCH
BEARING,SLEEVE
Possible match (shared part number)Naval Sea Systems Command
NSN 3040-01-495-5581 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 3040-01-495-5581?
NSN 3040-01-495-5581 has 1 manufacturer part number on file: 581-6985419-7 (Naval Sea Systems Command).
What NSN replaces 3040-01-495-5581?
11 possible matches (shared part number, not a government interchangeability claim): 3040-01-495-5631, 3950-01-495-6394, 3950-01-495-7606. Verify interchangeability with system specifications before substitution.
What are the specifications of 581-6985419-7?
Key specifications for 581-6985419-7: Surface Finish: 32.0 MICROINCHES; Step Quantity: 4; First End Diameter: 3.7480 INCHES MINIMUM AND 3.7500 INCHES MAXIMUM IN; Second End Diameter: 3.4930 INCHES MINIMUM AND 3.4950 INCHES MAXIMUM IN. 14 specifications are documented in the U.S. Government catalog.
Is NSN 3040-01-495-5581 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.