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2180199 — SEAT,HELICAL COMPRESSION SPRING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

2180199: SEAT,HELICAL COMPRESSION SPRING.

SEAT,HELICAL COMPRESSION SPRING. Key specifications include material: STEEL COMP 440C, design_type: SOLID, end_diameter: 0.2550 INCHES MINIMUM AND 0.2650 INCHES MAXIMUM IN, bore_diameter: 0.1877 INCHES MINIMUM AND 0.1887 INCHES MAXIMUM IN, overall_height: 0.4200 INCHES MINIMUM AND 0.4600 INCHES MAXIMUM IN, special_features: NOT CASEHARDENED. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-135-8527, 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
2180199
NSN: 5340-01-135-8527
FSC: 5340 — Hardware, Commercial
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
materialSTEEL COMP 440C
design_typeSOLID
end_diameter0.2550 INCHES MINIMUM AND 0.2650 INCHES MAXIMUM IN
bore_diameter0.1877 INCHES MINIMUM AND 0.1887 INCHES MAXIMUM IN
overall_height0.4200 INCHES MINIMUM AND 0.4600 INCHES MAXIMUM IN
special_featuresNOT CASEHARDENED
style_designatorSEAT
first_step_diameter0.4900 INCHES MINIMUM AND 0.5100 INCHES MAXIMUM IN
material_hardness_rating53.0 ROCKWELL C MINIMUM AND 60.0 ROCKWELL C MAXIMUM
distance_from_end_to_first_step0.3900 INCHES MINIMUM AND 0.4100 INCHES MAXIMUM IN
material_document_and_classificationAMS 5630 ASSN STD SINGLE MATERIAL RESPONSE
NSN5340-01-135-8527
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 2180199 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: 0.4900 INCHES MINIMUM AND 0.5100 INCHES MAXIMUM IN
•
MATERIAL HARDNESS RATING: 53.0 ROCKWELL C MINIMUM AND 60.0 ROCKWELL C MAXIMUM
•
END DIAMETER: 0.2550 INCHES MINIMUM AND 0.2650 INCHES MAXIMUM IN
•
DISTANCE FROM END TO FIRST STEP: 0.3900 INCHES MINIMUM AND 0.4100 INCHES MAXIMUM IN
•
DESIGN TYPE: SOLID
•
STYLE DESIGNATOR: SEAT
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5630 ASSN STD SINGLE MATERIAL RESPONSE
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.4200 INCHES MINIMUM AND 0.4600 INCHES MAXIMUM IN
FIRST STEP DIAMETER0.4900 INCHES MINIMUM AND 0.5100 INCHES MAXIMUM IN
MATERIAL HARDNESS RATING53.0 ROCKWELL C MINIMUM AND 60.0 ROCKWELL C MAXIMUM
END DIAMETER0.2550 INCHES MINIMUM AND 0.2650 INCHES MAXIMUM IN
DISTANCE FROM END TO FIRST STEP0.3900 INCHES MINIMUM AND 0.4100 INCHES MAXIMUM IN
DESIGN TYPESOLID
STYLE DESIGNATORSEAT
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5630 ASSN STD SINGLE MATERIAL RESPONSE
SPECIAL FEATURESNOT CASEHARDENED
BORE DIAMETER0.1877 INCHES MINIMUM AND 0.1887 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 2180199?
2180199 is a SEAT,HELICAL COMPRESSION SPRING.
What is the NSN for 2180199?
2180199 is cataloged in the U.S. Government catalog under NSN 5340-01-135-8527. 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.