Name: PISTON,INTERNAL COMBUSTION ENGIN
Brand: Unknown
SKU: K421

K421 ✓ Verified by PartsTable

— · MRO · MRO_GENERAL

WHAT YOU NEED TO KNOW

SAS cables have specific lane counts: 4i (internal) or 4e (external) Cable length matters — too short won't reach, too long creates clutter

Verify connector type on BOTH ends — many SAS cables are asymmetric

PRODUCT OVERVIEW

PISTON,INTERNAL COMBUSTION ENGIN. Key specifications include angle: 30.0 DEGREES, wheel_style: SPECIAL "ZB", hole_diameter: 0.625 INCHES NOMINAL IN, wheel_diameter: 1.875 INCHES NOMINAL IN, mounting_method: THREADED INSERT, thread_direction: RIGHT-HAND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5999-01-458-6643, 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

MRO→ MRO_GENERAL→ K421

NSN: 5999-01-458-6643
FSC: 5999
CAGE: 55285 — HENKEL CORPORATION (USA)

SPECIFICATIONS

angle	30.0 DEGREES
wheel_style	SPECIAL "ZB"
hole_diameter	0.625 INCHES NOMINAL IN
wheel_diameter	1.875 INCHES NOMINAL IN
mounting_method	THREADED INSERT
thread_direction	RIGHT-HAND
overall_thickness	0.688 INCHES NOMINAL IN
end_item_identification	JOINT STRS RD E/I FSCM 55285
thread_size_and_series/type_designator	0.688-16 UN
NSN	5999-01-458-6643

COMPONENT DIAGRAM

TECHNICAL CHARACTERISTICS (FLIS)

END ITEM IDENTIFICATION	JOINT STRS RD E/I FSCM 55285
END ITEM IDENTIFICATION	JOINT STRS RD E/I FSCM 55285

VERIFIED SUBSTITUTES & CROSS-REFERENCES 4

SX-1530-SInterchangeable

interchangeable cross-reference

interchangeable

K421Interchangeable

interchangeable cross-reference

interchangeable

109099Interchangeable

interchangeable cross-reference

interchangeable

128-029-0005Interchangeable

Same NIIN cross-reference

interchangeable

LIFECYCLE

StatusACTIVE

AvailabilityOEM and secondary market

RoHS CompliantEAR99ESD SensitiveNot HAZMAT

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FREQUENTLY ASKED QUESTIONS

What is K421?

K421 is a PISTON,INTERNAL COMBUSTION ENGIN. It is classified as a MRO (MRO_GENERAL).

What parts can replace K421?

There are 4 known substitutes for K421: SX-1530-S, K421, 109099 and 1 more. Substitute compatibility should be verified for your specific system.

What is the NSN for K421?

K421 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5999-01-458-6643. This indicates validated use in U.S. government and defense supply chains.

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