NSN 3040-01-399-0277 · NIIN 013990277 · Part number 167-6404330 FIND 18
Naval Sea Systems Command · FSC 3040 — Miscellaneous Power Transmission Equipment · FSG 30 — Mechanical Power Transmission Equipment · CAGE 53711
Government record, cited
NSN 3040-01-399-0277 — this item is cataloged by the U.S. Government under National Stock Number 3040-01-399-0277. Manufacturer of record part number: 167-6404330 FIND 18.
Also searched as3040-01-399-0277 ·
3040013990277 ·
NIIN 013990277 ·
01-399-0277 ·
FSC 3040 Miscellaneous Power Transmission Equipment · CAGE 53711 · 167-6404330 FIND 18 · 167-6404330
Straight Unthreaded Section Diameter: 0.6100 INCHES NOMINAL SECOND END FOURTH PORTION IN
Straight Unthreaded Section Diameter: 1.0760 INCHES NOMINAL SECOND END THIRD PORTION IN
Taper Largest Diameter: 1.8900 INCHES NOMINAL FIRST END FIRST PORTION IN
Identification
NSN: 3040-01-399-0277
NIIN: 013990277
FSC: 3040 — Miscellaneous Power Transmission Equipment
FSG: 30 — Mechanical Power Transmission Equipment
Primary part number: 167-6404330 FIND 18
Manufacturer: Naval Sea Systems Command
General Description
The Worm Shaft, cataloged under National Stock Number 3040-01-399-0277, 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 19 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 12 items share a part number with this NSN in the catalog (possible match — not a government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
3040-01-399-0277
Primary Part Number
167-6404330 FIND 18
Item Name
Worm Shaft
FSC / FSG
3040 / 30 — Miscellaneous Power Transmission Equipment
Manufacturer
Naval Sea Systems Command
Status
ACTIVE
Shaft Location
BOTH ENDS OF WORM
Worm Thread Lead
0.4375 INCHES NOMINAL IN
Worm Pitch Diameter
1.5000 INCHES NOMINAL IN
Worm Outside Diameter
1.7790 INCHES NOMINAL IN
Straight Unthreaded Section Diameter
0.6100 INCHES NOMINAL SECOND END FOURTH PORTION IN
Straight Unthreaded Section Diameter
1.0760 INCHES NOMINAL SECOND END THIRD PORTION IN
Taper Largest Diameter
1.8900 INCHES NOMINAL FIRST END FIRST PORTION IN
Unthreaded Section Keyway Depth
0.0730 INCHES NOMINAL SECOND END THIRD PORTION IN
Unthreaded Section Keyway Depth
0.0805 INCHES NOMINAL FIRST END THIRD PORTION IN
End Similarity
NOT IDENTICAL
Worm Thread Section Length
1.5000 INCHES NOMINAL IN
Worm Helix Angle
5 DEG 3 MIN
Material
STEEL CORROSION RESISTING
Worm Thread Quantity
1
Worm Thread Direction
RIGHT-HAND
Unthreaded Section Keyway Width
0.2510 INCHES NOMINAL FIRST END THIRD PORTION IN
Unthreaded Section Keyway Width
0.2510 INCHES NOMINAL SECOND END THIRD PORTION IN
Worm Pressure Angle in Deg
14.500
Worm Body Tapered Bearing Surface End
NOT PROVIDED
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 Items12
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
3040-01-399-0281167-6404330 FIND 16POSSIBLE MATCH
WORM SHAFT
Possible match (shared part number)Naval Sea Systems Command
3020-01-399-1849167-6404330 FIND 15POSSIBLE MATCH
GEAR,SPUR
Possible match (shared part number)Naval Sea Systems Command
3020-01-399-1850167-6404330 FIND 14POSSIBLE MATCH
GEAR,SPUR
Possible match (shared part number)Naval Sea Systems Command
3040-01-399-1856167-6404330 FIND 26POSSIBLE MATCH
CONNECTING LINK,RIGID
Possible match (shared part number)Naval Sea Systems Command
3020-01-399-5665167-6404330 FIND 13POSSIBLE MATCH
GEAR,SPUR
Possible match (shared part number)Naval Sea Systems Command
3020-01-399-6281167-6404330 FIND 10POSSIBLE MATCH
GEAR SECTOR,WORM WHEEL
Possible match (shared part number)Naval Sea Systems Command
3020-01-399-6282167-6404330 FIND 11POSSIBLE MATCH
GEAR SECTOR,WORM WHEEL
Possible match (shared part number)Naval Sea Systems Command
3020-01-400-2040167-6404330 FIND 48POSSIBLE MATCH
GUARD,MECHANICAL DRIVE
Possible match (shared part number)Naval Sea Systems Command
3040-01-400-2041167-6404330 FIND 73POSSIBLE MATCH
COLLAR,SHAFT
Possible match (shared part number)Naval Sea Systems Command
3020-01-400-2045167-6404330 FIND 8POSSIBLE MATCH
GEAR SECTOR,WORM WHEEL
Possible match (shared part number)Naval Sea Systems Command
NSN 3040-01-399-0277 is a Worm Shaft, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
What part numbers are listed for NSN 3040-01-399-0277?
NSN 3040-01-399-0277 has 1 manufacturer part number on file: 167-6404330 FIND 18 (Naval Sea Systems Command).
What NSN replaces 3040-01-399-0277?
12 possible matches (shared part number, not a government interchangeability claim): 3040-01-399-0281, 3020-01-399-1849, 3020-01-399-1850. Verify interchangeability with system specifications before substitution.
What are the specifications of 167-6404330 FIND 18?
Key specifications for 167-6404330 FIND 18: Shaft Location: BOTH ENDS OF WORM; Worm Thread Lead: 0.4375 INCHES NOMINAL IN; Overall Length: 17.7800 INCHES NOMINAL IN; Worm Pitch Diameter: 1.5000 INCHES NOMINAL IN. 19 specifications are documented in the U.S. Government catalog.
Is NSN 3040-01-399-0277 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.