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165-6668 — RING,PISTON

✓ Government record, cited
— · PIPE SECTION
PRODUCT OVERVIEW

165-6668: RING,PISTON.

The RING,PISTON is a the manufacturer industrial component. Key specifications include end_item_identification: DIESEL ENGINE, CATERPILLAR, part_name_assigned_by_controlling_agency: PISTON RING. This part is cataloged in the U.S.

Government catalog under NSN 4710-00-494-9824, 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
165-6668
NSN: 4710-00-494-9824
NIINs: 004949824, 016463280
FSC: 4710 — Pipe, Tube and Rigid Tubing
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
end_item_identificationDIESEL ENGINE, CATERPILLAR
part_name_assigned_by_controlling_agencyPISTON RING
NSN4710-00-494-9824
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: 165-6668 · OEM ⚠ VERIFY BEFORE ORDERING Schedule = wall thickness, NOT pipe diameter. Sch 40 and Sch 80 have the same OD but different wall thickness. Nominal pipe size ≠ actual OD — a 1" pipe is actually 1.315" OD ✓ BROKER TIP Sch 40 = standard wall, Sch 80 = heavy wall (higher pressure), Sch 160 = extra heavy. Seamless pipe is required for high-pressure applications — welded pipe has lower ratings PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
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FIRST END STYLE: PLAIN
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HEAT TREATMENT: COLD DRAWN 1/8 HARD CONDITION
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MATERIAL DOCUMENT AND CLASSIFICATION: MIL-T-6845 MIL SPEC SINGLE MATERIAL RESPONSE
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DIAMETER: 0.312 INCHES NOMINAL IN
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CROSS-SECTIONAL SHAPE STYLE: PLAIN ROUND
•
WALL THICKNESS: 0.035 INCHES NOMINAL IN
•
SECOND END RELATIONSHIP WITH FIRST END: IDENTICAL
•
MATERIAL: STEEL
TECHNICAL CHARACTERISTICS
FIRST END STYLEPLAIN
HEAT TREATMENTCOLD DRAWN 1/8 HARD CONDITION
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-T-6845 MIL SPEC SINGLE MATERIAL RESPONSE
DIAMETER0.312 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLEPLAIN ROUND
WALL THICKNESS0.035 INCHES NOMINAL IN
SECOND END RELATIONSHIP WITH FIRST ENDIDENTICAL
MATERIALSTEEL
CONSTRUCTIONSEAMLESS
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 165-6668?
165-6668 is a RING,PISTON.
What is the NSN for 165-6668?
165-6668 is cataloged in the U.S. Government catalog under NSN 4710-00-494-9824. 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.