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118426 — SEAT,HELICAL COMPRESSION SPRING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

118426: SEAT,HELICAL COMPRESSION SPRING.

SEAT,HELICAL COMPRESSION SPRING. Key specifications include material: IRON, design_type: SOLID, end_diameter: 1.2500 INCHES NOMINAL IN, bore_diameter: 0.5310 INCHES NOMINAL IN, overall_height: 0.4690 INCHES NOMINAL IN, style_designator: SEAT. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-429-4111, 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
118426
NSN: 5340-00-429-4111
FSC: 5340 — Hardware, Commercial
CAGE: 64104 — DRESSER, LLC (USA)
SPECIFICATIONS
materialIRON
design_typeSOLID
end_diameter1.2500 INCHES NOMINAL IN
bore_diameter0.5310 INCHES NOMINAL IN
overall_height0.4690 INCHES NOMINAL IN
style_designatorSEAT
first_step_length0.1560 INCHES NOMINAL IN
counterbore_length0.4050 INCHES NOMINAL IN
first_step_diameter1.7500 INCHES NOMINAL IN
counterbore_diameter0.5310 INCHES NOMINAL IN
countersink_diameter1.0620 INCHES NOMINAL IN
second_step_diameter2.2500 INCHES NOMINAL IN
NSN5340-00-429-4111
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 118426 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: 1.7500 INCHES NOMINAL IN
•
END DIAMETER: 1.2500 INCHES NOMINAL IN
•
COUNTERSINK DIAMETER: 1.0620 INCHES NOMINAL IN
•
DISTANCE FROM END TO FIRST STEP: 0.0810 INCHES MINIMUM AND 0.2060 INCHES MAXIMUM IN
•
DESIGN TYPE: SOLID
•
STYLE DESIGNATOR: SEAT
•
COUNTERBORE LENGTH: 0.4050 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.4690 INCHES NOMINAL IN
FIRST STEP DIAMETER1.7500 INCHES NOMINAL IN
END DIAMETER1.2500 INCHES NOMINAL IN
COUNTERSINK DIAMETER1.0620 INCHES NOMINAL IN
DISTANCE FROM END TO FIRST STEP0.0810 INCHES MINIMUM AND 0.2060 INCHES MAXIMUM IN
DESIGN TYPESOLID
STYLE DESIGNATORSEAT
COUNTERBORE LENGTH0.4050 INCHES NOMINAL IN
SECOND STEP DIAMETER2.2500 INCHES NOMINAL IN
COUNTERBORE DIAMETER0.5310 INCHES NOMINAL 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
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 118426?
118426 is a SEAT,HELICAL COMPRESSION SPRING.
What is the NSN for 118426?
118426 is cataloged in the U.S. Government catalog under NSN 5340-00-429-4111. 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.