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HP865118 — SEAT,HELICAL COMPRESSION SPRING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

HP865118: SEAT,HELICAL COMPRESSION SPRING.

SEAT,HELICAL COMPRESSION SPRING. Key specifications include material: ALUMINUM ALLOY, design_type: SOLID, end_diameter: 0.3480 INCHES NOMINAL IN, bore_diameter: 0.1270 INCHES NOMINAL IN, overall_height: 0.1520 INCHES NOMINAL IN, special_features: MATL-ALUM. ALLOY QQ-A-268,ALLOY 2024-T4.

This part is cataloged in the U.S. Government catalog under NSN 5340-00-866-8265, 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
HP865118
NSN: 5340-00-866-8265
FSC: 5340 — Hardware, Commercial
CAGE: 70236 — TACTAIR FLUID CONTROLS INC (USA)
SPECIFICATIONS
materialALUMINUM ALLOY
design_typeSOLID
end_diameter0.3480 INCHES NOMINAL IN
bore_diameter0.1270 INCHES NOMINAL IN
overall_height0.1520 INCHES NOMINAL IN
special_featuresMATL-ALUM. ALLOY QQ-A-268,ALLOY 2024-T4
style_designatorSEAT
surface_treatmentANODIZE
first_step_diameter0.4500 INCHES NOMINAL IN
counterbore_diameter0.2810 INCHES NOMINAL IN
distance_from_end_to_first_step0.0900 INCHES NOMINAL IN
surface_treatment_document_and_classificationMIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE
NSN5340-00-866-8265
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: HP865118 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
KEY FEATURES
•
FIRST STEP DIAMETER: 0.4500 INCHES NOMINAL IN
•
END DIAMETER: 0.3480 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE
•
DISTANCE FROM END TO FIRST STEP: 0.0900 INCHES NOMINAL IN
•
DESIGN TYPE: SOLID
•
STYLE DESIGNATOR: SEAT
•
COUNTERBORE DIAMETER: 0.2810 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.1520 INCHES NOMINAL IN
FIRST STEP DIAMETER0.4500 INCHES NOMINAL IN
END DIAMETER0.3480 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE
DISTANCE FROM END TO FIRST STEP0.0900 INCHES NOMINAL IN
DESIGN TYPESOLID
STYLE DESIGNATORSEAT
COUNTERBORE DIAMETER0.2810 INCHES NOMINAL IN
SPECIAL FEATURESMATL-ALUM. ALLOY QQ-A-268,ALLOY 2024-T4
SURFACE TREATMENTANODIZE
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Demilitarization required — mutilation
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FREQUENTLY ASKED QUESTIONS
What is HP865118?
HP865118 is a SEAT,HELICAL COMPRESSION SPRING.
What is the NSN for HP865118?
HP865118 is cataloged in the U.S. Government catalog under NSN 5340-00-866-8265. 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.