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Technical Data Sheet
MCL W740900 ✓ 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 OVERALL, overall_width: 0.250 INCHES NOMINAL IN, overall_length: 0.750 INCHES NOMINAL IN, style_designator: RECTANGULAR, cross-sectional_thickness: 0.188 INCHES NOMINAL IN, cross-sectional_shape_style: SOLID SINGLE OR COMPOSITION. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-417-4692, 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
MCL W740900
NSN: 5330-01-417-4692
FSC: 5330
CAGE: 52249 — MESTEK, INC. DBA AMERICAN WARMING & VENTILATING DIVISION DIV AMERICAN WARMING AND VENTILATING (USA)
SPECIFICATIONS
materialRUBBER CHLOROPRENE CLASS CR OVERALL
overall_width0.250 INCHES NOMINAL IN
overall_length0.750 INCHES NOMINAL IN
style_designatorRECTANGULAR
cross-sectional_thickness0.188 INCHES NOMINAL IN
cross-sectional_shape_styleSOLID SINGLE OR COMPOSITION
material_document_and_classificationASTM D1056 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5330-01-417-4692
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MCL W740900 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 THICKNESS: 0.188 INCHES NOMINAL IN
MATERIAL: RUBBER CHLOROPRENE CLASS CR OVERALL
STYLE DESIGNATOR: RECTANGULAR
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM D1056 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL THICKNESS0.188 INCHES NOMINAL IN
MATERIALRUBBER CHLOROPRENE CLASS CR OVERALL
STYLE DESIGNATORRECTANGULAR
OVERALL LENGTH0.750 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONASTM D1056 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OVERALL WIDTH0.250 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
7409Interchangeable
interchangeable cross-reference
interchangeable
MT409PInterchangeable
interchangeable cross-reference
interchangeable
87542-1704ITEM17Interchangeable
interchangeable cross-reference
interchangeable
3T079AInterchangeable
interchangeable cross-reference
interchangeable
7409BInterchangeable
interchangeable cross-reference
interchangeable
7409CInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MCL W740900?
MCL W740900 is a GASKET.
What parts can replace MCL W740900?
There are 21 known substitutes for MCL W740900: 7409, MT409P, 87542-1704ITEM17 and 18 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MCL W740900?
MCL W740900 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-417-4692. This indicates validated use in U.S. government and defense supply chains.
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