FSC: 3040 — Miscellaneous Power Transmission Equipment
FSG: 30 — Mechanical Power Transmission Equipment
General Description
The Extension Shaft, cataloged under National Stock Number 3040-00-101-0688, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 10 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
3040-00-101-0688
Item Name
Extension Shaft
FSC / FSG
3040 / 30 — Miscellaneous Power Transmission Equipment
Status
ACTIVE
Socket Diameter
0.120 INCHES NOMINAL IN
Length
0.520 INCHES NOMINAL IN
Socket Depth
0.307 INCHES NOMINAL IN
Style Designator
PLAIN SOCKET
Outside Diameter
0.250 INCHES NOMINAL IN
Shaft End Design
MALE AND FEMALE
Shaft End Diameter
0.120 INCHES NOMINAL IN
Shoulder Length
0.335 INCHES NOMINAL IN
End Type
INTEGRAL COUPLING
Shaft End Configuration
ROUND
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
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
754372-1
3/2Design control — primary reference
U.S. Government activity
No interchangeability data on file.
Other items in FSC 3040 — Miscellaneous Power Transmission Equipment
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
3040-00-001-0046
3040-00-001-0046 · Item name not on file
3040-00-001-0047
3040-00-001-0047 · Item name not on file
3040-00-001-0048
3040-00-001-0048 · Item name not on file
3040-00-001-0068
3040-00-001-0068 · Item name not on file
3040-00-001-0077
3040-00-001-0077 · Item name not on file
3040-00-001-0078
3040-00-001-0078 · Item name not on file
3040-00-001-0089
3040-00-001-0089 · Item name not on file
3040-00-001-1224
3040-00-001-1224 · Item name not on file
Frequently Asked Questions
What is NSN 3040-00-101-0688?
NSN 3040-00-101-0688 is a Extension Shaft, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
What are the specifications of 3040-00-101-0688?
Key specifications for 3040-00-101-0688: Socket Diameter: 0.120 INCHES NOMINAL IN; Length: 0.520 INCHES NOMINAL IN; Socket Depth: 0.307 INCHES NOMINAL IN; Style Designator: PLAIN SOCKET. 10 specifications are documented in the U.S. Government catalog.
Is NSN 3040-00-101-0688 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.