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266728 — SEAL,PLAIN ENCASED

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

266728: SEAL,PLAIN ENCASED.

The SEAL,PLAIN ENCASED is a the manufacturer industrial component. Key specifications include material: STEEL CASE, case_style: SQUARE, seal_width: 0.290 INCHES NOMINAL IN, special_features: TRIPLE SEALING ELEMENTS OF SYNTECH RUBBER CAGEC 01212; ITEM HAS EXTERNAL BORE, housing_bore_diameter: 2.630 INCHES NOMINAL IN, accommodated_shaft_diameter: 1.750 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5330-01-319-5204, 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
266728
NSN: 5330-01-319-5204
FSC: 5330 — Packing and Gasket Materials
CAGE: 04627 — HYSTER-YALE GROUP, INC. DIV HYSTER-YALE MATERIALS HANDLING (USA)
SPECIFICATIONS
materialSTEEL CASE
case_styleSQUARE
seal_width0.290 INCHES NOMINAL IN
special_featuresTRIPLE SEALING ELEMENTS OF SYNTECH RUBBER CAGEC 01212; ITEM HAS EXTERNAL BORE
housing_bore_diameter2.630 INCHES NOMINAL IN
accommodated_shaft_diameter1.750 INCHES NOMINAL IN
NSN5330-01-319-5204
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 266728 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
•
SEAL WIDTH: 0.290 INCHES NOMINAL IN
•
HOUSING BORE DIAMETER: 2.630 INCHES NOMINAL IN
•
CASE STYLE: SQUARE
•
ACCOMMODATED SHAFT DIAMETER: 1.750 INCHES NOMINAL IN
•
MATERIAL: STEEL CASE
TECHNICAL CHARACTERISTICS
SEAL WIDTH0.290 INCHES NOMINAL IN
HOUSING BORE DIAMETER2.630 INCHES NOMINAL IN
CASE STYLESQUARE
SPECIAL FEATURESTRIPLE SEALING ELEMENTS OF SYNTECH RUBBER CAGEC 01212; ITEM HAS EXTERNAL BORE
ACCOMMODATED SHAFT DIAMETER1.750 INCHES NOMINAL IN
MATERIALSTEEL CASE
SUBSTITUTES & CROSS-REFERENCES 1
200912Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 266728?
266728 is a SEAL,PLAIN ENCASED.
What parts can replace 266728?
There is 1 known substitute for 266728: 200912. Substitute compatibility should be verified for your specific system.
What is the NSN for 266728?
266728 is cataloged in the U.S. Government catalog under NSN 5330-01-319-5204. 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.