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20366-1200 — SEAT,HELICAL COMPRESSION SPRING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

20366-1200: SEAT,HELICAL COMPRESSION SPRING.

SEAT,HELICAL COMPRESSION SPRING. Key specifications include material: STEEL CORROSION RESISTING, design_type: SOLID, end_diameter: 0.2050 INCHES NOMINAL IN, bore_diameter: 0.5062 INCHES NOMINAL IN, overall_height: 0.5305 INCHES NOMINAL IN, style_designator: SEAT. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-103-6392, 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
20366-1200
NSN: 5340-01-103-6392
FSC: 5340 — Hardware, Commercial
CAGE: 78062 — SARGENT AEROSPACE & DEFENSE, LLC DBA SARGENT CONTROLS & AEROSPACE DIV SARGENT CONTROLS & AEROSPACE (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING
design_typeSOLID
end_diameter0.2050 INCHES NOMINAL IN
bore_diameter0.5062 INCHES NOMINAL IN
overall_height0.5305 INCHES NOMINAL IN
style_designatorSEAT
bore_taper_in_deg40.0
counterbore_length0.1620 INCHES NOMINAL IN
first_step_diameter0.8751 INCHES NOMINAL IN
counterbore_diameter0.5368 INCHES NOMINAL IN
distance_from_end_to_first_step0.5192 INCHES NOMINAL IN
NSN5340-01-103-6392
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 20366-1200 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: 0.8751 INCHES NOMINAL IN
•
END DIAMETER: 0.2050 INCHES NOMINAL IN
•
DISTANCE FROM END TO FIRST STEP: 0.5192 INCHES NOMINAL IN
•
DESIGN TYPE: SOLID
•
STYLE DESIGNATOR: SEAT
•
COUNTERBORE LENGTH: 0.1620 INCHES NOMINAL IN
•
COUNTERBORE DIAMETER: 0.5368 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.5305 INCHES NOMINAL IN
FIRST STEP DIAMETER0.8751 INCHES NOMINAL IN
END DIAMETER0.2050 INCHES NOMINAL IN
DISTANCE FROM END TO FIRST STEP0.5192 INCHES NOMINAL IN
DESIGN TYPESOLID
STYLE DESIGNATORSEAT
COUNTERBORE LENGTH0.1620 INCHES NOMINAL IN
COUNTERBORE DIAMETER0.5368 INCHES NOMINAL IN
BORE TAPER IN DEG40.0
BORE DIAMETER0.5062 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 2
20366-001 FIND 12Reference document
Same NSN cross-reference
Reference document — Secondary reference
20366-001Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
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 20366-1200?
20366-1200 is a SEAT,HELICAL COMPRESSION SPRING.
What parts can replace 20366-1200?
There are 2 known substitutes for 20366-1200: 20366-001 FIND 12, 20366-001. Substitute compatibility should be verified for your specific system.
What is the NSN for 20366-1200?
20366-1200 is cataloged in the U.S. Government catalog under NSN 5340-01-103-6392. 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.