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PartsTable / COMPONENT / 28773
28773 ✓ Verified by PartsTable
— · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The BUSHING,SLEEVE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 932 OR COPPER ALLOY 903 OVERALL, material_document_and_classification: QQ-C-390,ALLOY 932 FED SPEC 1ST MATERIAL RESPONSE OR QQ-C-390,ALLOY 903 FED SPEC 2ND MATERIAL RESPONSE OVERALL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-290-7356, 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
28773
NSN: 5330-00-290-7356
FSC: 5330
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
materialCOPPER ALLOY 932 OR COPPER ALLOY 903 OVERALL
material_document_and_classificationQQ-C-390,ALLOY 932 FED SPEC 1ST MATERIAL RESPONSE OR QQ-C-390,ALLOY 903 FED SPEC 2ND MATERIAL RESPONSE OVERALL
NSN5330-00-290-7356
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 28773 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
•
HOUSING BORE DIAMETER: 1.504 INCHES NOMINAL IN
•
ATTACHMENT METHOD: CEMENTED
•
CASE STYLE: SQUARE
•
MATERIAL: STEEL CASE
•
SEAL WIDTH: 0.375 INCHES NOMINAL IN
•
FSC APPLICATION DATA: ENGINE,RECIPROCATING,AIRCRAFT
•
ACCOMMODATED SHAFT DIAMETER: 0.875 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
HOUSING BORE DIAMETER1.504 INCHES NOMINAL IN
ATTACHMENT METHODCEMENTED
CASE STYLESQUARE
MATERIALSTEEL CASE
SEAL WIDTH0.375 INCHES NOMINAL IN
FSC APPLICATION DATAENGINE,RECIPROCATING,AIRCRAFT
MATERIALRUBBER SYNTHETIC SEALING ELEMENT
ACCOMMODATED SHAFT DIAMETER0.875 INCHES NOMINAL IN
SEALING ELEMENT STYLEANGULAR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
28-774Interchangeable
interchangeable cross-reference
interchangeable
028-11676-00Interchangeable
interchangeable cross-reference
interchangeable
028-00774Interchangeable
interchangeable cross-reference
interchangeable
287783Interchangeable
interchangeable cross-reference
interchangeable
32-28395ITEM2Interchangeable
interchangeable cross-reference
interchangeable
28773Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 28773?
28773 is a BUSHING,SLEEVE.
What parts can replace 28773?
There are 10 known substitutes for 28773: 28-774, 028-11676-00, 028-00774 and 7 more. Substitute compatibility should be verified for your specific system.
Is 28773 still available?
28773 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026