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4A1559A — ROTOR,ENGINE POPPET VALVE

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

4A1559A: ROTOR,ENGINE POPPET VALVE.

The ROTOR,ENGINE POPPET VALVE is a the manufacturer industrial component. Key specifications include bore_diameter: 1.255 INCHES NOMINAL IN, overall_height: 0.763 INCHES NOMINAL IN, style_designator: POSITIVE TYPE-STRAIGHT BORE, first_step_length: 0.230 INCHES NOMINAL IN, rotation_direction: CLOCKWISE OR COUNTERCLOCKWISE, second_step_length: 0.375 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 2815-00-831-1127, 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
4A1559A
NSN: 2815-00-831-1127
FSC: 2815 — Diesel Engines and Components
CAGE: 14541 — COOPER MACHINERY SERVICES LLC (USA)
SPECIFICATIONS
bore_diameter1.255 INCHES NOMINAL IN
overall_height0.763 INCHES NOMINAL IN
style_designatorPOSITIVE TYPE-STRAIGHT BORE
first_step_length0.230 INCHES NOMINAL IN
rotation_directionCLOCKWISE OR COUNTERCLOCKWISE
second_step_length0.375 INCHES NOMINAL IN
first_step_diameter2.435 INCHES NOMINAL IN
second_step_diameter2.820 INCHES NOMINAL IN
minimum_rotation_in_deg360.0
distance_from_end_to_nearest_step0.053 INCHES NOMINAL IN
spring_and_ball_retainer_inside_diameter1.924 INCHES NOMINAL IN
NSN2815-00-831-1127
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available ROTOR,ENGINE POPPET VALVE TITLE COMPONENT PN 4A1559A MFR ROTOR,ENGINE POPPET VA
KEY FEATURES
•
FIRST STEP DIAMETER: 2.435 INCHES NOMINAL IN
•
SECOND STEP LENGTH: 0.375 INCHES NOMINAL IN
•
STYLE DESIGNATOR: POSITIVE TYPE-STRAIGHT BORE
•
ROTATION DIRECTION: CLOCKWISE OR COUNTERCLOCKWISE
•
DISTANCE FROM END TO NEAREST STEP: 0.053 INCHES NOMINAL IN
•
SECOND STEP DIAMETER: 2.820 INCHES NOMINAL IN
•
FIRST STEP LENGTH: 0.230 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.763 INCHES NOMINAL IN
FIRST STEP DIAMETER2.435 INCHES NOMINAL IN
SECOND STEP LENGTH0.375 INCHES NOMINAL IN
STYLE DESIGNATORPOSITIVE TYPE-STRAIGHT BORE
ROTATION DIRECTIONCLOCKWISE OR COUNTERCLOCKWISE
DISTANCE FROM END TO NEAREST STEP0.053 INCHES NOMINAL IN
SECOND STEP DIAMETER2.820 INCHES NOMINAL IN
FIRST STEP LENGTH0.230 INCHES NOMINAL IN
MINIMUM ROTATION IN DEG360.0
SPRING AND BALL RETAINER INSIDE DIAMETER1.924 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 4A1559A?
4A1559A is a ROTOR,ENGINE POPPET VALVE.
What is the NSN for 4A1559A?
4A1559A is cataloged in the U.S. Government catalog under NSN 2815-00-831-1127. 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.