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718980-2 — SEAT,HELICAL COMPRESSION SPRING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

718980-2: SEAT,HELICAL COMPRESSION SPRING.

SEAT,HELICAL COMPRESSION SPRING. Key specifications include material: STEEL, design_type: SOLID, bore_diameter: 0.2080 INCHES MINIMUM AND 0.2230 INCHES MAXIMUM IN, special_features: MATL-STEEL AMS 5612;NOT CASEHARDENED, first_step_length: 0.1800 INCHES NOMINAL IN, counterbore_length: 0.1300 INCHES MINIMUM AND 0.1400 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-890-5191, 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
718980-2
NSN: 5340-00-890-5191
FSC: 5340 — Hardware, Commercial
CAGE: 73030 — HAMILTON SUNDSTRAND CORPORATION DBA COLLINS AEROSPACE (USA)
SPECIFICATIONS
materialSTEEL
design_typeSOLID
bore_diameter0.2080 INCHES MINIMUM AND 0.2230 INCHES MAXIMUM IN
special_featuresMATL-STEEL AMS 5612;NOT CASEHARDENED
first_step_length0.1800 INCHES NOMINAL IN
counterbore_length0.1300 INCHES MINIMUM AND 0.1400 INCHES MAXIMUM IN
first_step_diameter0.4945 INCHES MINIMUM AND 0.4975 INCHES MAXIMUM IN
counterbore_diameter0.3300 INCHES MINIMUM AND 0.3370 INCHES MAXIMUM IN
countersink_diameter0.4100 INCHES NOMINAL IN
countersink_angle_in_deg35.0
material_hardness_rating30.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM
NSN5340-00-890-5191
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 718980-2 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
•
COUNTERSINK ANGLE IN DEG: 35.0
•
FIRST STEP DIAMETER: 0.4945 INCHES MINIMUM AND 0.4975 INCHES MAXIMUM IN
•
MATERIAL HARDNESS RATING: 30.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM
•
COUNTERSINK DIAMETER: 0.4100 INCHES NOMINAL IN
•
DESIGN TYPE: SOLID
•
COUNTERBORE LENGTH: 0.1300 INCHES MINIMUM AND 0.1400 INCHES MAXIMUM IN
•
COUNTERBORE DIAMETER: 0.3300 INCHES MINIMUM AND 0.3370 INCHES MAXIMUM IN
•
FIRST STEP LENGTH: 0.1800 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
COUNTERSINK ANGLE IN DEG35.0
FIRST STEP DIAMETER0.4945 INCHES MINIMUM AND 0.4975 INCHES MAXIMUM IN
MATERIAL HARDNESS RATING30.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM
COUNTERSINK DIAMETER0.4100 INCHES NOMINAL IN
DESIGN TYPESOLID
COUNTERBORE LENGTH0.1300 INCHES MINIMUM AND 0.1400 INCHES MAXIMUM IN
COUNTERBORE DIAMETER0.3300 INCHES MINIMUM AND 0.3370 INCHES MAXIMUM IN
FIRST STEP LENGTH0.1800 INCHES NOMINAL IN
SPECIAL FEATURESMATL-STEEL AMS 5612;NOT CASEHARDENED
BORE DIAMETER0.2080 INCHES MINIMUM AND 0.2230 INCHES MAXIMUM IN
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: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 718980-2?
718980-2 is a SEAT,HELICAL COMPRESSION SPRING.
What is the NSN for 718980-2?
718980-2 is cataloged in the U.S. Government catalog under NSN 5340-00-890-5191. 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.