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MC13674 — SEAT,HELICAL COMPRESSION SPRING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

MC13674: SEAT,HELICAL COMPRESSION SPRING.

SEAT,HELICAL COMPRESSION SPRING. Key specifications include material: STEEL, design_type: SOLID, special_features: PART OF VALVE SWITCHING; T.O.9H8-12-4-3 FIGURE 10 INDEX 73; USED ON F-15 AIRCRAFT, surface_treatment: PASSIVATE, fsc_application_data: AIRCRAFT HYDRAULIC,VACUUM,DEICING SYSTEMS. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-540-5581, 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
MC13674
NSN: 5340-00-540-5581
FSC: 5340 — Hardware, Commercial
CAGE: 76050 — EATON AEROSPACE LLC DBA STERER ENGINEERING DIV M.C.AEROSPACE (USA)
SPECIFICATIONS
materialSTEEL
design_typeSOLID
special_featuresPART OF VALVE SWITCHING; T.O.9H8-12-4-3 FIGURE 10 INDEX 73; USED ON F-15 AIRCRAFT
surface_treatmentPASSIVATE
fsc_application_dataAIRCRAFT HYDRAULIC,VACUUM,DEICING SYSTEMS
NSN5340-00-540-5581
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MC13674 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
•
FSC APPLICATION DATA: AIRCRAFT HYDRAULIC,VACUUM,DEICING SYSTEMS
•
DESIGN TYPE: SOLID
•
SURFACE TREATMENT: PASSIVATE
•
MATERIAL: STEEL
TECHNICAL CHARACTERISTICS
FSC APPLICATION DATAAIRCRAFT HYDRAULIC,VACUUM,DEICING SYSTEMS
DESIGN TYPESOLID
SPECIAL FEATURESPART OF VALVE SWITCHING; T.O.9H8-12-4-3 FIGURE 10 INDEX 73; USED ON F-15 AIRCRAFT
SURFACE TREATMENTPASSIVATE
MATERIALSTEEL
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
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MC13674?
MC13674 is a SEAT,HELICAL COMPRESSION SPRING.
What is the NSN for MC13674?
MC13674 is cataloged in the U.S. Government catalog under NSN 5340-00-540-5581. 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.