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B-1638 PIECE 8 — SHAFT,SHOULDERED

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

B-1638 PIECE 8: SHAFT,SHOULDERED.

The SHAFT,SHOULDERED is a the manufacturer industrial component. Key specifications include material: STEEL, step_quantity: 11, end_similarity: NOT IDENTICAL, overall_length: 32.5625 INCHES NOMINAL IN, surface_finish: 16.0 MICROINCHES, first_end_style: CIRCULAR GROOVED. This part is cataloged in the U.S.

Government catalog under NSN 3040-01-198-9556, 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
B-1638 PIECE 8
NSN: 3040-01-198-9556
FSC: 3040 — Miscellaneous Power Transmission Equipment
CAGE: 63857 — CIRCOR NAVAL SOLUTIONS LLC DBA WARREN PUMPS (USA)
SPECIFICATIONS
materialSTEEL
step_quantity11
end_similarityNOT IDENTICAL
overall_length32.5625 INCHES NOMINAL IN
surface_finish16.0 MICROINCHES
first_end_styleCIRCULAR GROOVED
second_end_styleEXTERNAL THREADED
first_end_diameter1.6250 INCHES NOMINAL IN
second_end_diameter1.2500 INCHES NOMINAL IN
largest_step_diameter2.127 INCHES NOMINAL IN
first_end_groove_width0.0680 INCHES NOMINAL IN
first_end_groove_diameter1.5500 INCHES NOMINAL IN
NSN3040-01-198-9556
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SHAFT,SHOULDERED TITLE COMPONENT PN B-1638 PIECE 8 MFR SHAFT,SHOULDERED
KEY FEATURES
•
SURFACE FINISH: 16.0 MICROINCHES
•
SECOND END EXTERNAL THREAD LENGTH: 0.500 INCHES NOMINAL IN
•
STEP QUANTITY: 11
•
FIRST END DIAMETER: 1.6250 INCHES NOMINAL IN
•
SECOND END DIAMETER: 1.2500 INCHES NOMINAL IN
•
LARGEST STEP DIAMETER: 2.127 INCHES NOMINAL IN
•
FIRST END STYLE: CIRCULAR GROOVED
TECHNICAL CHARACTERISTICS
SURFACE FINISH16.0 MICROINCHES
SECOND END EXTERNAL THREAD LENGTH0.500 INCHES NOMINAL IN
STEP QUANTITY11
FIRST END DIAMETER1.6250 INCHES NOMINAL IN
SECOND END DIAMETER1.2500 INCHES NOMINAL IN
LARGEST STEP DIAMETER2.127 INCHES NOMINAL IN
FIRST END STYLECIRCULAR GROOVED
OVERALL LENGTH32.5625 INCHES NOMINAL IN
END SIMILARITYNOT IDENTICAL
FIRST END DISTANCE FROM END TO GROOVE0.119 INCHES NOMINAL 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
016B0815Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is B-1638 PIECE 8?
B-1638 PIECE 8 is a SHAFT,SHOULDERED.
What parts can replace B-1638 PIECE 8?
There is 1 known substitute for B-1638 PIECE 8: 016B0815. Substitute compatibility should be verified for your specific system.
What is the NSN for B-1638 PIECE 8?
B-1638 PIECE 8 is cataloged in the U.S. Government catalog under NSN 3040-01-198-9556. 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.