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3342A021 — SEAT,HELICAL COMPRESSION SPRING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

3342A021: SEAT,HELICAL COMPRESSION SPRING.

SEAT,HELICAL COMPRESSION SPRING. Key specifications include design_type: SOLID, special_features: FOR USE ON INTAKE VALVE P/N 3142H101 AND EXHAUST VALVE P/N 3142A171, style_designator: SEAT, end_item_identification: NSN 3930-01-599-9978, part_name_assigned_by_controlling_agency: CAP. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-616-2053, 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
3342A021
NSN: 5340-01-616-2053
FSC: 5340 — Hardware, Commercial
CAGE: 13446 — PERKINS ENGINES INC (USA)
SPECIFICATIONS
design_typeSOLID
special_featuresFOR USE ON INTAKE VALVE P/N 3142H101 AND EXHAUST VALVE P/N 3142A171
style_designatorSEAT
end_item_identificationNSN 3930-01-599-9978
part_name_assigned_by_controlling_agencyCAP
NSN5340-01-616-2053
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 3342A021 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
•
DESIGN TYPE: SOLID
•
STYLE DESIGNATOR: SEAT
TECHNICAL CHARACTERISTICS
DESIGN TYPESOLID
STYLE DESIGNATORSEAT
SPECIAL FEATURESFOR USE ON INTAKE VALVE P/N 3142H101 AND EXHAUST VALVE P/N 3142A171
PART NAME ASSIGNED BY CONTROLLING AGENCYCAP
END ITEM IDENTIFICATIONNSN 3930-01-599-9978
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 3342A021?
3342A021 is a SEAT,HELICAL COMPRESSION SPRING.
What is the NSN for 3342A021?
3342A021 is cataloged in the U.S. Government catalog under NSN 5340-01-616-2053. 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.