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26J81PC42 — SEAL RING,METAL

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

26J81PC42: SEAL RING,METAL.

The SEAL RING,METAL is a the manufacturer industrial component. Key specifications include material: IRON OVERALL, ring_style: EXPANDING CONCENTRIC, joint_style: DIAGONAL JOINT, overall_width: 0.2480 INCHES MINIMUM AND 0.2490 INCHES MAXIMUM IN, outside_diameter: 5.250 INCHES NOMINAL IN, fsc_application_data: STEAM TURBINE. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-273-0620, 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
26J81PC42
NSN: 5330-00-273-0620
FSC: 5330 — Packing and Gasket Materials
CAGE: 11660 — WESTINGHOUSE ELECTRIC CORP CONTROL BUSINESS UNIT
SPECIFICATIONS
materialIRON OVERALL
ring_styleEXPANDING CONCENTRIC
joint_styleDIAGONAL JOINT
overall_width0.2480 INCHES MINIMUM AND 0.2490 INCHES MAXIMUM IN
outside_diameter5.250 INCHES NOMINAL IN
fsc_application_dataSTEAM TURBINE
radial_wall_thickness0.1800 INCHES MINIMUM AND 0.2000 INCHES MAXIMUM IN
cross-sectional_shape_stylePLAIN RECTANGULAR, STRAIGHT FACE
material_document_and_classificationQQ-I-652,CLASS 30 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5330-00-273-0620
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 26J81PC42 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: STEAM TURBINE
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-I-652,CLASS 30 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: PLAIN RECTANGULAR, STRAIGHT FACE
•
OUTSIDE DIAMETER: 5.250 INCHES NOMINAL IN
•
JOINT STYLE: DIAGONAL JOINT
•
RADIAL WALL THICKNESS: 0.1800 INCHES MINIMUM AND 0.2000 INCHES MAXIMUM IN
•
RING STYLE: EXPANDING CONCENTRIC
TECHNICAL CHARACTERISTICS
FSC APPLICATION DATASTEAM TURBINE
OVERALL WIDTH0.2480 INCHES MINIMUM AND 0.2490 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-I-652,CLASS 30 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLEPLAIN RECTANGULAR, STRAIGHT FACE
OUTSIDE DIAMETER5.250 INCHES NOMINAL IN
JOINT STYLEDIAGONAL JOINT
RADIAL WALL THICKNESS0.1800 INCHES MINIMUM AND 0.2000 INCHES MAXIMUM IN
RING STYLEEXPANDING CONCENTRIC
MATERIALIRON OVERALL
SUBSTITUTES & CROSS-REFERENCES 4
1389662Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
25J749PC8Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
26J243PC42Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
26J52PC99Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Semi-active item — no replacement plannedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 26J81PC42?
26J81PC42 is a SEAL RING,METAL.
What parts can replace 26J81PC42?
There are 4 known substitutes for 26J81PC42: 1389662, 25J749PC8, 26J243PC42 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 26J81PC42?
26J81PC42 is cataloged in the U.S. Government catalog under NSN 5330-00-273-0620. 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.