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PartsTable / COMPONENT / 42477A
42477A ✓ 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 GASKET is a the manufacturer industrial component. Key specifications include material: RUBBER CHLOROPRENE CLASS CR AND ASBESTOS OVERALL, hole_diameter: 0.328 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, overall_width: 3.250 INCHES NOMINAL IN, overall_length: 5.250 INCHES NOMINAL IN, cross-sectional_thickness: 0.014 INCHES MINIMUM AND 0.018 INCHES MAXIMUM IN, cross-sectional_shape_style: SOLID SINGLE OR COMPOSITION. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-447-8902, 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
42477A
NSN: 5330-00-447-8902
FSC: 5330
CAGE: 95535 — MARION DIV OF TECUMSEH PRODUCTS CO (USA)
SPECIFICATIONS
materialRUBBER CHLOROPRENE CLASS CR AND ASBESTOS OVERALL
hole_diameter0.328 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
overall_width3.250 INCHES NOMINAL IN
overall_length5.250 INCHES NOMINAL IN
cross-sectional_thickness0.014 INCHES MINIMUM AND 0.018 INCHES MAXIMUM IN
cross-sectional_shape_styleSOLID SINGLE OR COMPOSITION
material_document_and_classification258 FSCM 25472 MFR REF ALL MATERIAL RESPONSES OR K68 FSCM 25472 MFR REF ALL MATERIAL RESPONSES OR 7228 FSCM 78912 MFR REF ALL MATERIAL RESPONSES OVERALL
NSN5330-00-447-8902
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 42477A 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
•
CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
•
MATERIAL DOCUMENT AND CLASSIFICATION: 258 FSCM 25472 MFR REF ALL MATERIAL RESPONSES OR K68 FSCM 25472 MFR REF ALL MATERIAL RESPONSES OR 7228 FSCM 78912 MFR REF ALL MATERIAL RESPONSES OVERALL
•
HOLE DIAMETER: 0.328 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
•
MATERIAL: RUBBER CHLOROPRENE CLASS CR AND ASBESTOS OVERALL
•
CROSS-SECTIONAL THICKNESS: 0.014 INCHES MINIMUM AND 0.018 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL LENGTH5.250 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
OVERALL WIDTH3.250 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATION258 FSCM 25472 MFR REF ALL MATERIAL RESPONSES OR K68 FSCM 25472 MFR REF ALL MATERIAL RESPONSES OR 7228 FSCM 78912 MFR REF ALL MATERIAL RESPONSES OVERALL
HOLE DIAMETER0.328 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
MATERIALRUBBER CHLOROPRENE CLASS CR AND ASBESTOS OVERALL
CROSS-SECTIONAL THICKNESS0.014 INCHES MINIMUM AND 0.018 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
SC5950-0098-1Interchangeable
interchangeable cross-reference
interchangeable
M7734Interchangeable
interchangeable cross-reference
interchangeable
PEI 6645Interchangeable
interchangeable cross-reference
interchangeable
42477Interchangeable
interchangeable cross-reference
interchangeable
47477Interchangeable
interchangeable cross-reference
interchangeable
570Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 42477A?
42477A is a GASKET.
What parts can replace 42477A?
There are 7 known substitutes for 42477A: SC5950-0098-1, M7734, PEI 6645 and 4 more. Substitute compatibility should be verified for your specific system.
Is 42477A still available?
42477A 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