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6671266-1 — RETAINER,HELICAL COMPRESSION SPR

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

6671266-1: RETAINER,HELICAL COMPRESSION SPR.

RETAINER,HELICAL COMPRESSION SPR. Key specifications include material: STEEL, overall_height: 3.174 INCHES NOMINAL IN, flange_diameter: 2.500 INCHES NOMINAL IN, flange_thickness: 0.375 INCHES NOMINAL IN, special_features: ALLOY STEEL; SOLID FILM LUBRICANT, style_designator: IRREGULAR. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-490-6349, 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
6671266-1
NSN: 5340-01-490-6349
FSC: 5340 — Hardware, Commercial
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialSTEEL
overall_height3.174 INCHES NOMINAL IN
flange_diameter2.500 INCHES NOMINAL IN
flange_thickness0.375 INCHES NOMINAL IN
special_featuresALLOY STEEL; SOLID FILM LUBRICANT
style_designatorIRREGULAR
body_inside_diameter1.500 INCHES NOMINAL IN
body_outside_diameter2.500 INCHES NOMINAL IN
casehardening_indicatorNOT CASEHARDENED
end_item_identificationCANISTER, MK22
NSN5340-01-490-6349
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 6671266-1 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
•
FLANGE DIAMETER: 2.500 INCHES NOMINAL IN
•
FLANGE THICKNESS: 0.375 INCHES NOMINAL IN
•
BODY OUTSIDE DIAMETER: 2.500 INCHES NOMINAL IN
•
STYLE DESIGNATOR: IRREGULAR
•
BODY INSIDE DIAMETER: 1.500 INCHES NOMINAL IN
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
TECHNICAL CHARACTERISTICS
FLANGE DIAMETER2.500 INCHES NOMINAL IN
OVERALL HEIGHT3.174 INCHES NOMINAL IN
FLANGE THICKNESS0.375 INCHES NOMINAL IN
BODY OUTSIDE DIAMETER2.500 INCHES NOMINAL IN
STYLE DESIGNATORIRREGULAR
BODY INSIDE DIAMETER1.500 INCHES NOMINAL IN
CASEHARDENING INDICATORNOT CASEHARDENED
SPECIAL FEATURESALLOY STEEL; SOLID FILM LUBRICANT
END ITEM IDENTIFICATIONCANISTER, MK22
MATERIALSTEEL
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
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 6671266-1?
6671266-1 is a RETAINER,HELICAL COMPRESSION SPR.
What is the NSN for 6671266-1?
6671266-1 is cataloged in the U.S. Government catalog under NSN 5340-01-490-6349. 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.