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1609999 — ADAPTER,SPLINE

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

1609999: ADAPTER,SPLINE.

The ADAPTER,SPLINE is a the manufacturer industrial component. Key specifications include material: STEEL, spline_type: INTERNAL, spline_length: 3.750 INCHES NOMINAL IN, overall_length: 3.750 INCHES NOMINAL IN, teeth_quantity: 27, outside_diameter: 6.988 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 3040-00-672-7478, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
1609999
NSN: 3040-00-672-7478
FSC: 3040 — Miscellaneous Power Transmission Equipment
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialSTEEL
spline_typeINTERNAL
spline_length3.750 INCHES NOMINAL IN
overall_length3.750 INCHES NOMINAL IN
teeth_quantity27
outside_diameter6.988 INCHES NOMINAL IN
special_features32 INTERNAL SPLINES, EXTERNAL TWO SPLINE WIDTHS 1.500 IN. AND 0.750 IN. GROOVE WIDTH 0.806 IN. DEEP IN
spline_major_diameter4.125 INCHES NOMINAL IN
spline_minor_diameter3.875 INCHES NOMINAL IN
NSN3040-00-672-7478
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available ADAPTER,SPLINE TITLE COMPONENT PN 1609999 MFR ADAPTER,SPLINE
KEY FEATURES
•
SPLINE MINOR DIAMETER: 3.875 INCHES NOMINAL IN
•
SPLINE TYPE: INTERNAL
•
TEETH QUANTITY: 27
•
OUTSIDE DIAMETER: 6.988 INCHES NOMINAL IN
•
SPLINE LENGTH: 3.750 INCHES NOMINAL IN
•
SPLINE MAJOR DIAMETER: 4.125 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
SPLINE MINOR DIAMETER3.875 INCHES NOMINAL IN
SPLINE TYPEINTERNAL
TEETH QUANTITY27
OUTSIDE DIAMETER6.988 INCHES NOMINAL IN
SPLINE LENGTH3.750 INCHES NOMINAL IN
OVERALL LENGTH3.750 INCHES NOMINAL IN
SPLINE MAJOR DIAMETER4.125 INCHES NOMINAL IN
SPECIAL FEATURES32 INTERNAL SPLINES, EXTERNAL TWO SPLINE WIDTHS 1.500 IN. AND 0.750 IN. GROOVE WIDTH 0.806 IN. DEEP IN
MATERIALSTEEL
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 3040-00-001-0047 3040-00-001-0048 3040-00-001-0068 3040-00-001-0077 3040-00-001-0078 3040-00-001-0089 3040-00-001-1224
SUBSTITUTES & CROSS-REFERENCES 1
BUWEPSDWG1609999Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1609999?
1609999 is a ADAPTER,SPLINE.
What parts can replace 1609999?
There is 1 known substitute for 1609999: BUWEPSDWG1609999. Substitute compatibility should be verified for your specific system.
What is the NSN for 1609999?
1609999 is cataloged in the U.S. Government catalog under NSN 3040-00-672-7478. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.