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104779621 — RETAINER,HELICAL COMPRESSION SPR

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

104779621: RETAINER,HELICAL COMPRESSION SPR.

RETAINER,HELICAL COMPRESSION SPR. Key specifications include material: STEEL COMP E4340, overall_height: 0.835 INCHES NOMINAL IN, style_designator: IRREGULAR, body_inside_diameter: 0.405 INCHES NOMINAL IN, fsc_application_data: CYLINDER ASSEMBLY,ACTUATING,LINEAR, body_outside_diameter: 0.415 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-172-3731, 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
104779621
NSN: 5340-01-172-3731
FSC: 5340 — Hardware, Commercial
CAGE: 5SKZ6 — AEROTEK AVIATION LLC (USA)
SPECIFICATIONS
materialSTEEL COMP E4340
overall_height0.835 INCHES NOMINAL IN
style_designatorIRREGULAR
body_inside_diameter0.405 INCHES NOMINAL IN
fsc_application_dataCYLINDER ASSEMBLY,ACTUATING,LINEAR
body_outside_diameter0.415 INCHES NOMINAL IN
casehardening_indicatorNOT CASEHARDENED
material_document_and_classificationMIL-S-5000 MIL SPEC SINGLE MATERIAL RESPONSE
NSN5340-01-172-3731
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 104779621 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
•
FSC APPLICATION DATA: CYLINDER ASSEMBLY,ACTUATING,LINEAR
•
BODY OUTSIDE DIAMETER: 0.415 INCHES NOMINAL IN
•
STYLE DESIGNATOR: IRREGULAR
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-5000 MIL SPEC SINGLE MATERIAL RESPONSE
•
BODY INSIDE DIAMETER: 0.405 INCHES NOMINAL IN
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
MATERIAL: STEEL COMP E4340
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.835 INCHES NOMINAL IN
FSC APPLICATION DATACYLINDER ASSEMBLY,ACTUATING,LINEAR
BODY OUTSIDE DIAMETER0.415 INCHES NOMINAL IN
STYLE DESIGNATORIRREGULAR
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-5000 MIL SPEC SINGLE MATERIAL RESPONSE
BODY INSIDE DIAMETER0.405 INCHES NOMINAL IN
CASEHARDENING INDICATORNOT CASEHARDENED
MATERIALSTEEL COMP E4340
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: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 104779621?
104779621 is a RETAINER,HELICAL COMPRESSION SPR.
What is the NSN for 104779621?
104779621 is cataloged in the U.S. Government catalog under NSN 5340-01-172-3731. 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.