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740379-2 — RETAINER,HELICAL COMPRESSION SPR

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

740379-2: RETAINER,HELICAL COMPRESSION SPR.

RETAINER,HELICAL COMPRESSION SPR. Key specifications include material: STEEL COMP 630, overall_height: 0.627 INCHES MINIMUM AND 0.632 INCHES MAXIMUM IN, flange_diameter: 0.600 INCHES MINIMUM AND 0.610 INCHES MAXIMUM IN, flange_thickness: 0.592 INCHES MINIMUM AND 0.602 INCHES MAXIMUM IN, style_designator: PARALLEL, surface_treatment: PASSIVATE. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-067-8342, 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
740379-2
NSN: 5340-01-067-8342
FSC: 5340 — Hardware, Commercial
CAGE: 73030 — HAMILTON SUNDSTRAND CORPORATION DBA COLLINS AEROSPACE (USA)
SPECIFICATIONS
materialSTEEL COMP 630
overall_height0.627 INCHES MINIMUM AND 0.632 INCHES MAXIMUM IN
flange_diameter0.600 INCHES MINIMUM AND 0.610 INCHES MAXIMUM IN
flange_thickness0.592 INCHES MINIMUM AND 0.602 INCHES MAXIMUM IN
style_designatorPARALLEL
surface_treatmentPASSIVATE
body_inside_diameter0.421 INCHES NOMINAL IN
body_outside_diameter0.500 INCHES NOMINAL IN
casehardening_indicatorNOT CASEHARDENED
outside_chamfer_angle_in_deg45.0
material_document_and_classificationHS279 FSCM 73030 MFR REF SINGLE MATERIAL RESPONSE
surface_treatment_document_and_classificationHS248 CL 42,TY A1 FSCM 73030 MFR REF SINGLE TREATMENT RESPONSE
NSN5340-01-067-8342
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 740379-2 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
•
FLANGE DIAMETER: 0.600 INCHES MINIMUM AND 0.610 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: HS248 CL 42,TY A1 FSCM 73030 MFR REF SINGLE TREATMENT RESPONSE
•
FLANGE THICKNESS: 0.592 INCHES MINIMUM AND 0.602 INCHES MAXIMUM IN
•
BODY OUTSIDE DIAMETER: 0.500 INCHES NOMINAL IN
•
STYLE DESIGNATOR: PARALLEL
•
MATERIAL DOCUMENT AND CLASSIFICATION: HS279 FSCM 73030 MFR REF SINGLE MATERIAL RESPONSE
•
BODY INSIDE DIAMETER: 0.421 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
FLANGE DIAMETER0.600 INCHES MINIMUM AND 0.610 INCHES MAXIMUM IN
OVERALL HEIGHT0.627 INCHES MINIMUM AND 0.632 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONHS248 CL 42,TY A1 FSCM 73030 MFR REF SINGLE TREATMENT RESPONSE
FLANGE THICKNESS0.592 INCHES MINIMUM AND 0.602 INCHES MAXIMUM IN
BODY OUTSIDE DIAMETER0.500 INCHES NOMINAL IN
STYLE DESIGNATORPARALLEL
MATERIAL DOCUMENT AND CLASSIFICATIONHS279 FSCM 73030 MFR REF SINGLE MATERIAL RESPONSE
BODY INSIDE DIAMETER0.421 INCHES NOMINAL IN
OUTSIDE CHAMFER ANGLE IN DEG45.0
CASEHARDENING INDICATORNOT CASEHARDENED
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 740379-2?
740379-2 is a RETAINER,HELICAL COMPRESSION SPR.
What is the NSN for 740379-2?
740379-2 is cataloged in the U.S. Government catalog under NSN 5340-01-067-8342. 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.