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ND1690A — SHAFT ASSEMBLY,FLEXIBLE

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

ND1690A: SHAFT ASSEMBLY,FLEXIBLE.

The SHAFT ASSEMBLY,FLEXIBLE is a the manufacturer industrial component. Key specifications include material: STEEL CORESTEEL CORE, thread_class: 2B BOTH ENDS2B BOTH ENDS, thread_depth: 0.405 INCHES NOMINAL BOTH ENDS0.405 INCHES NOMINAL BOTH ENDS IN, core_diameter: 0.145 INCHES NOMINAL0.145 INCHES NOMINAL IN, overall_length: 22.875 INCHES NOMINAL22.875 INCHES NOMINAL IN, thread_location: INTERNAL BOTH ENDSINTERNAL BOTH ENDS. This part is cataloged in the U.S.

Government catalog under NSN 3040-00-653-9606, 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
ND1690A
NSN: 3040-00-653-9606
FSC: 3040 — Miscellaneous Power Transmission Equipment
CAGE: 82796 — COLTEC INDUSTRIES INC. DBA FAIRBANKS MORSE ENGINE DIV FAIRBANKS MORSE ENGINE (USA)
SPECIFICATIONS
materialSTEEL CORESTEEL CORE
thread_class2B BOTH ENDS2B BOTH ENDS
thread_depth0.405 INCHES NOMINAL BOTH ENDS0.405 INCHES NOMINAL BOTH ENDS IN
core_diameter0.145 INCHES NOMINAL0.145 INCHES NOMINAL IN
overall_length22.875 INCHES NOMINAL22.875 INCHES NOMINAL IN
thread_locationINTERNAL BOTH ENDSINTERNAL BOTH ENDS
thread_directionRIGHT-HAND BOTH ENDSRIGHT-HAND BOTH ENDS
core_removabilityREMOVABLEREMOVABLE
width_across_flats1.000 INCHES NOMINAL BOTH ENDS1.000 INCHES NOMINAL BOTH ENDS IN
core_overall_length19.875 INCHES NOMINAL19.875 INCHES NOMINAL IN
shank_outside_diameter0.503 INCHES NOMINAL BOTH ENDS0.503 INCHES NOMINAL BOTH ENDS IN
casing_outside_diameter0.500 INCHES NOMINAL0.500 INCHES NOMINAL IN
NSN3040-00-653-9606
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SHAFT ASSEMBLY,FLEXIBLE TITLE COMPONENT PN ND1690A MFR SHAFT ASSEMBLY,FLEXIBL
KEY FEATURES
•
WIDTH ACROSS FLATS: 1.000 INCHES NOMINAL BOTH ENDS1.000 INCHES NOMINAL BOTH ENDS IN
•
CASING PROTECTIVE DEVICE TYPE: PLASTIC COVERPLASTIC COVER
•
THREAD DEPTH: 0.405 INCHES NOMINAL BOTH ENDS0.405 INCHES NOMINAL BOTH ENDS IN
•
THREAD LOCATION: INTERNAL BOTH ENDSINTERNAL BOTH ENDS
•
CORE DIAMETER: 0.145 INCHES NOMINAL0.145 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND BOTH ENDSRIGHT-HAND BOTH ENDS
•
CASING LENGTH BETWEEN FERRULES: 17.500 INCHES NOMINAL17.500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS1.000 INCHES NOMINAL BOTH ENDS1.000 INCHES NOMINAL BOTH ENDS IN
CASING PROTECTIVE DEVICE TYPEPLASTIC COVERPLASTIC COVER
THREAD DEPTH0.405 INCHES NOMINAL BOTH ENDS0.405 INCHES NOMINAL BOTH ENDS IN
OVERALL LENGTH22.875 INCHES NOMINAL22.875 INCHES NOMINAL IN
THREAD LOCATIONINTERNAL BOTH ENDSINTERNAL BOTH ENDS
CORE DIAMETER0.145 INCHES NOMINAL0.145 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND BOTH ENDSRIGHT-HAND BOTH ENDS
CASING LENGTH BETWEEN FERRULES17.500 INCHES NOMINAL17.500 INCHES NOMINAL IN
CORE ROTATION DIRECTIONCLOCKWISECLOCKWISE
SHANK OUTSIDE DIAMETER0.503 INCHES NOMINAL BOTH ENDS0.503 INCHES NOMINAL BOTH ENDS IN
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
16704010Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
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 ND1690A?
ND1690A is a SHAFT ASSEMBLY,FLEXIBLE.
What parts can replace ND1690A?
There is 1 known substitute for ND1690A: 16704010. Substitute compatibility should be verified for your specific system.
What is the NSN for ND1690A?
ND1690A is cataloged in the U.S. Government catalog under NSN 3040-00-653-9606. 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.