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540006-55 — SEAL,PLAIN ENCASED

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

540006-55: SEAL,PLAIN ENCASED.

The SEAL,PLAIN ENCASED is a the manufacturer industrial component. Key specifications include material: STEEL CASE, case_style: RECESSED, seal_width: 0.438 INCHES NOMINAL IN, temp_rating: -65.0 FAHRENHEIT AND 225.0 FAHRENHEIT DEGF, outside_diameter: 3.505 INCHES NOMINAL IN, special_features: 2500 RPM RPM. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-126-9636, 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
540006-55
NSN: 5330-00-126-9636
FSC: 5330 — Packing and Gasket Materials
CAGE: 51829 — CR INDUSTRIES CHICAGO RAWHIDE MFG CO (USA)
SPECIFICATIONS
materialSTEEL CASE
case_styleRECESSED
seal_width0.438 INCHES NOMINAL IN
temp_rating-65.0 FAHRENHEIT AND 225.0 FAHRENHEIT DEGF
outside_diameter3.505 INCHES NOMINAL IN
special_features2500 RPM RPM
surface_treatmentPLASTIC CASE
housing_bore_diameter3.500 INCHES NOMINAL IN
sealing_element_styleANGULAR
accommodated_shaft_diameter2.500 INCHES NOMINAL IN
NSN5330-00-126-9636
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 540006-55 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
•
TEMP RATING: -65.0 FAHRENHEIT AND 225.0 FAHRENHEIT DEGF
•
SEAL WIDTH: 0.438 INCHES NOMINAL IN
•
SEALING ELEMENT STYLE: ANGULAR
•
OUTSIDE DIAMETER: 3.505 INCHES NOMINAL IN
•
HOUSING BORE DIAMETER: 3.500 INCHES NOMINAL IN
•
CASE STYLE: RECESSED
•
ACCOMMODATED SHAFT DIAMETER: 2.500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
TEMP RATING-65.0 FAHRENHEIT AND 225.0 FAHRENHEIT DEGF
SEAL WIDTH0.438 INCHES NOMINAL IN
SEALING ELEMENT STYLEANGULAR
OUTSIDE DIAMETER3.505 INCHES NOMINAL IN
HOUSING BORE DIAMETER3.500 INCHES NOMINAL IN
CASE STYLERECESSED
SPECIAL FEATURES2500 RPM RPM
ACCOMMODATED SHAFT DIAMETER2.500 INCHES NOMINAL IN
SURFACE TREATMENTPLASTIC CASE
MATERIALSTEEL CASE
SUBSTITUTES & CROSS-REFERENCES 3
383074Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
30T22Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
24986Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 540006-55?
540006-55 is a SEAL,PLAIN ENCASED.
What parts can replace 540006-55?
There are 3 known substitutes for 540006-55: 383074, 30T22, 24986. Substitute compatibility should be verified for your specific system.
What is the NSN for 540006-55?
540006-55 is cataloged in the U.S. Government catalog under NSN 5330-00-126-9636. 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.