Second End Spline Minor Diameter: 0.6570 INCHES NOMINAL IN
First End Style: PLAIN
Second End Spline Major Diameter: 0.7480 INCHES NOMINAL IN
Material Document and Classification: MIL-S-20166,TYPE A,GRADE M MIL SPEC SINGLE MATERIAL RESPONSE
Identification
NSN: 3040-01-022-6237
NIIN: 010226237
FSC: 3040 — Miscellaneous Power Transmission Equipment
FSG: 30 — Mechanical Power Transmission Equipment
General Description
The Shaft,straight, cataloged under National Stock Number 3040-01-022-6237, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government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
3040-01-022-6237
Item Name
Shaft,straight
FSC / FSG
3040 / 30 — Miscellaneous Power Transmission Equipment
Status
ACTIVE
Surface Finish
32.0 MICROINCHES
First End Diameter
0.7500 INCHES NOMINAL IN
Second End Diameter
0.7500 INCHES NOMINAL IN
Second End Spline Minor Diameter
0.6570 INCHES NOMINAL IN
First End Style
PLAIN
Second End Spline Major Diameter
0.7480 INCHES NOMINAL IN
Material Document and Classification
MIL-S-20166,TYPE A,GRADE M MIL SPEC SINGLE MATERIAL RESPONSE
End Similarity
NOT IDENTICAL
Second End Spline Quantity
10
Second End Style
SPLINED (STRAIGHT)
Material
STEEL
Second End Spline Length
1.000 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 Items6
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
3040-01-022-623873791-27X3PC13POSSIBLE MATCH
SHAFT,SHOULDERED
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
3040-01-022-762373791-27X3PC12POSSIBLE MATCH
YOKE,TENSION,SHAFT
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
3040-01-023-089473791-27X3PC11POSSIBLE MATCH
YOKE,SHAFT
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
3020-01-023-101173791-27X3PC7POSSIBLE MATCH
GEAR,SPUR
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
3040-01-023-115873791-27X3PC40POSSIBLE MATCH
SHAFT,SHOULDERED
Possible match (shared part number)Electric Boat Corporation Div General Dynamics Electric Boat
3020-01-023-285540 2HOLEWCS1CLPOSSIBLE MATCH
LINK,ROLLER CHAIN
Possible match (shared part number)Diamond Chain Co Div of Amsted Industries Inc
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
75791-27X3PC10
5/9Secondary reference
U.S. Government activity
1955783
D/9Drawing number reference only
U.S. Government activity
73791-27X3PC10
3/2Design control — primary reference
U.S. Government activity
Related Parts
3040-01-022-6238POSSIBLE MATCH
SHAFT,SHOULDERED
73791-27X3PC13
3040-01-022-7623POSSIBLE MATCH
YOKE,TENSION,SHAFT
73791-27X3PC12
3040-01-023-0894POSSIBLE MATCH
YOKE,SHAFT
73791-27X3PC11
3020-01-023-1011POSSIBLE MATCH
GEAR,SPUR
73791-27X3PC7
3040-01-023-1158POSSIBLE MATCH
SHAFT,SHOULDERED
73791-27X3PC40
3020-01-023-2855POSSIBLE MATCH
LINK,ROLLER CHAIN
40 2HOLEWCS1CL
Frequently Asked Questions
What is NSN 3040-01-022-6237?
NSN 3040-01-022-6237 is a Shaft,straight, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
What NSN replaces 3040-01-022-6237?
6 possible matches (shared part number, not a government interchangeability claim): 3040-01-022-6238, 3040-01-022-7623, 3040-01-023-0894. Verify interchangeability with system specifications before substitution.
What are the specifications of 3040-01-022-6237?
Key specifications for 3040-01-022-6237: Surface Finish: 32.0 MICROINCHES; First End Diameter: 0.7500 INCHES NOMINAL IN; Second End Diameter: 0.7500 INCHES NOMINAL IN; Second End Spline Minor Diameter: 0.6570 INCHES NOMINAL IN. 12 specifications are documented in the U.S. Government catalog.
Is NSN 3040-01-022-6237 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.