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21185-1001-1 — SEAT,HELICAL COMPRESSION SPRING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

21185-1001-1: SEAT,HELICAL COMPRESSION SPRING.

SEAT,HELICAL COMPRESSION SPRING. Key specifications include material: ALUMINUM ALLOY, bore_diameter: 0.3860 INCHES NOMINAL IN, overall_height: 0.4820 INCHES NOMINAL IN, style_designator: SEAT, first_step_diameter: 1.6100 INCHES NOMINAL IN, counterbore_diameter: 0.3860 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-494-9962, 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
21185-1001-1
NSN: 5340-01-494-9962
FSC: 5340 — Hardware, Commercial
CAGE: 78062 — SARGENT AEROSPACE & DEFENSE, LLC DBA SARGENT CONTROLS & AEROSPACE DIV SARGENT CONTROLS & AEROSPACE (USA)
SPECIFICATIONS
materialALUMINUM ALLOY
bore_diameter0.3860 INCHES NOMINAL IN
overall_height0.4820 INCHES NOMINAL IN
style_designatorSEAT
first_step_diameter1.6100 INCHES NOMINAL IN
counterbore_diameter0.3860 INCHES NOMINAL IN
second_step_diameter1.9800 INCHES NOMINAL IN
NSN5340-01-494-9962
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 21185-1001-1 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: 1.6100 INCHES NOMINAL IN
•
STYLE DESIGNATOR: SEAT
•
SECOND STEP DIAMETER: 1.9800 INCHES NOMINAL IN
•
COUNTERBORE DIAMETER: 0.3860 INCHES NOMINAL IN
•
BORE DIAMETER: 0.3860 INCHES NOMINAL IN
•
MATERIAL: ALUMINUM ALLOY
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.4820 INCHES NOMINAL IN
FIRST STEP DIAMETER1.6100 INCHES NOMINAL IN
STYLE DESIGNATORSEAT
SECOND STEP DIAMETER1.9800 INCHES NOMINAL IN
COUNTERBORE DIAMETER0.3860 INCHES NOMINAL IN
BORE DIAMETER0.3860 INCHES NOMINAL IN
MATERIALALUMINUM ALLOY
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 1
21834 FIND 12Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 21185-1001-1?
21185-1001-1 is a SEAT,HELICAL COMPRESSION SPRING.
What parts can replace 21185-1001-1?
There is 1 known substitute for 21185-1001-1: 21834 FIND 12. Substitute compatibility should be verified for your specific system.
What is the NSN for 21185-1001-1?
21185-1001-1 is cataloged in the U.S. Government catalog under NSN 5340-01-494-9962. 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.