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MRL504122 — RETAINER,SPRING

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

MRL504122: RETAINER,SPRING.

The RETAINER,SPRING is a the manufacturer industrial component. Key specifications include end_item_identification: ACFT ENG R1820. This part is cataloged in the U.S.

Government catalog under NSN 2810-00-306-6139, 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
MRL504122
NSN: 2810-00-306-6139
FSC: 2810 — Gasoline Reciprocating Engines, Aircraft Prime Mover; and Components
CAGE: 02106 — MRL INC (USA)
SPECIFICATIONS
end_item_identificationACFT ENG R1820
NSN2810-00-306-6139
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available RETAINER,SPRING TITLE COMPONENT PN MRL504122 MFR RETAINER,SPRING
KEY FEATURES
•
GENERAL CHARACTERISTICS ITEM DESCRIPTION: MATL STEEL PER AMS 6322; HARDNESS PER ROCKWELL C19 MIN AND C26 MAX; 0.88 IN. LONG; FIRST END THREADED 1.375-16,1.3307 IN. MIN AND 1.3337 IN. MAX PITCH DIA; FLANGE 1.68 IN. OD; SECOND END HEXAGON 0.868 IN. MIN AND 0.875 IN. MAX ACROSS; BORE 0.68 IN. DIA BY 0.8 IN. DEEP FROM FIRST END; COUNTERBORE 1.12 IN. DIA BY 0.4 IN. DEEP IN
TECHNICAL CHARACTERISTICS
GENERAL CHARACTERISTICS ITEM DESCRIPTIONMATL STEEL PER AMS 6322; HARDNESS PER ROCKWELL C19 MIN AND C26 MAX; 0.88 IN. LONG; FIRST END THREADED 1.375-16,1.3307 IN. MIN AND 1.3337 IN. MAX PITCH DIA; FLANGE 1.68 IN. OD; SECOND END HEXAGON 0.868 IN. MIN AND 0.875 IN. MAX ACROSS; BORE 0.68 IN. DIA BY 0.8 IN. DEEP FROM FIRST END; COUNTERBORE 1.12 IN. DIA BY 0.4 IN. DEEP IN
END ITEM IDENTIFICATIONACFT ENG R1820
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MRL504122?
MRL504122 is a RETAINER,SPRING.
What is the NSN for MRL504122?
MRL504122 is cataloged in the U.S. Government catalog under NSN 2810-00-306-6139. 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.