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31989L — RING,PISTON

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

31989L: RING,PISTON.

The RING,PISTON is a the manufacturer industrial component. Key specifications include material: IRON OVERALL, special_features: RING FOR UNLOADER PISTON, end_item_identification: PUMP ASSEMBLY,VILTER MANUFACTURING CO.,SERIES 440 REFRIGERATION COMPRESSOR. This part is cataloged in the U.S.

Government catalog under NSN 4310-01-361-2289, 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
31989L
NSN: 4310-01-361-2289
FSC: 4310 — Compressors and Vacuum Pumps
CAGE: 63145 — VILTER MFG CORP (USA)
SPECIFICATIONS
materialIRON OVERALL
special_featuresRING FOR UNLOADER PISTON
end_item_identificationPUMP ASSEMBLY,VILTER MANUFACTURING CO.,SERIES 440 REFRIGERATION COMPRESSOR
NSN4310-01-361-2289
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available RING,PISTON TITLE COMPONENT PN 31989L MFR RING,PISTON
KEY FEATURES
•
MATERIAL: IRON OVERALL
TECHNICAL CHARACTERISTICS
SPECIAL FEATURESRING FOR UNLOADER PISTON
END ITEM IDENTIFICATIONPUMP ASSEMBLY,VILTER MANUFACTURING CO.,SERIES 440 REFRIGERATION COMPRESSOR
MATERIALIRON OVERALL
OTHER ITEMS IN FSC 4310 — Compressors and Vacuum Pumps
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4310-00-000-0050 4310-00-001-0059 4310-00-001-2044 4310-00-001-3477 4310-00-001-3493 4310-00-001-6194 4310-00-001-6381 4310-00-001-7755
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 31989L?
31989L is a RING,PISTON.
What is the NSN for 31989L?
31989L is cataloged in the U.S. Government catalog under NSN 4310-01-361-2289. 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.