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Technical Data Sheet

78/86-1711316 — O-RING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

78/86-1711316: O-RING.

The O-RING is a the manufacturer industrial component. Key specifications include special_features: NEXT HIGHER ASSEMBLY LUBRICATION AND SPEED CONTROL SYSTEM; GASKET SIZE 20.0 X 2.65 MILLIMETERS MM, end_item_identification: AIR-COOLED DIESEL ENGINE, MODEL ETQ178F, part_name_assigned_by_controlling_agency: SEALING RING. This part is cataloged in the U.S.

Government catalog under NSN 5331-01-538-1063, 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
78/86-1711316
NSN: 5331-01-538-1063
FSC: 5331 — O-ring
CAGE: 4AWQ2 — EASTERN TOOLS & EQUIPMENT INC (USA)
SPECIFICATIONS
special_featuresNEXT HIGHER ASSEMBLY LUBRICATION AND SPEED CONTROL SYSTEM; GASKET SIZE 20.0 X 2.65 MILLIMETERS MM
end_item_identificationAIR-COOLED DIESEL ENGINE, MODEL ETQ178F
part_name_assigned_by_controlling_agencySEALING RING
NSN5331-01-538-1063
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 78/86-1711316 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
TECHNICAL CHARACTERISTICS
SPECIAL FEATURESNEXT HIGHER ASSEMBLY LUBRICATION AND SPEED CONTROL SYSTEM; GASKET SIZE 20.0 X 2.65 MILLIMETERS MM
PART NAME ASSIGNED BY CONTROLLING AGENCYSEALING RING
END ITEM IDENTIFICATIONAIR-COOLED DIESEL ENGINE, MODEL ETQ178F
OTHER ITEMS IN FSC 5331 — O-ring
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5331-00-001-1971 5331-00-001-1979 5331-00-001-3904 5331-00-001-3905 5331-00-001-3906 5331-00-001-3908 5331-00-001-3923 5331-00-001-3924
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 78/86-1711316?
78/86-1711316 is a O-RING.
What is the NSN for 78/86-1711316?
78/86-1711316 is cataloged in the U.S. Government catalog under NSN 5331-01-538-1063. This indicates validated use in U.S. government and defense supply chains.
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