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Technical Data Sheet
C3641 ✓ 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 FLUOROSILICONE CLASS FQ AND ALUMINUM ALLOY 6061 OVERALL, hole_diameter: 0.281 INCHES MINIMUM AND 0.289 INCHES MAXIMUM LOCATION NOT OTHERWISE SPECIFIED IN, surface_treatment: ANODIZE OVERALL, bolt_hole_quantity: 10, gage_ring_thickness: 0.090 INCHES NOMINAL IN, bolt_circle_diameter: 5.000 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-412-9900, 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
C3641
NSN: 5330-00-412-9900
FSC: 5330
CAGE: 81755 — LOCKHEED MARTIN CORPORATION DIV LOCKHEED MARTIN AERONAUTICS COMPANY (USA)
SPECIFICATIONS
materialRUBBER FLUOROSILICONE CLASS FQ AND ALUMINUM ALLOY 6061 OVERALL
hole_diameter0.281 INCHES MINIMUM AND 0.289 INCHES MAXIMUM LOCATION NOT OTHERWISE SPECIFIED IN
surface_treatmentANODIZE OVERALL
bolt_hole_quantity10
gage_ring_thickness0.090 INCHES NOMINAL IN
bolt_circle_diameter5.000 INCHES NOMINAL IN
cross-sectional_shape_styleMETAL AND SYNTHETIC RUBBER
material_document_and_classificationLS-53,FSCM 71984 MFR REF 1ST MATERIAL RESPONSE OR QQ-A-250/11,T6 FED SPEC 2ND MATERIAL RESPONSE OVERALL
NSN5330-00-412-9900
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: C3641 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: METAL AND SYNTHETIC RUBBER
MATERIAL DOCUMENT AND CLASSIFICATION: LS-53,FSCM 71984 MFR REF 1ST MATERIAL RESPONSE OR QQ-A-250/11,T6 FED SPEC 2ND MATERIAL RESPONSE OVERALL
SURFACE TREATMENT: ANODIZE OVERALL
MATERIAL: RUBBER FLUOROSILICONE CLASS FQ AND ALUMINUM ALLOY 6061 OVERALL
HOLE DIAMETER: 0.281 INCHES MINIMUM AND 0.289 INCHES MAXIMUM LOCATION NOT OTHERWISE SPECIFIED IN
GAGE RING THICKNESS: 0.090 INCHES NOMINAL IN
BOLT CIRCLE DIAMETER: 5.000 INCHES NOMINAL IN
BOLT HOLE QUANTITY: 10
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL SHAPE STYLEMETAL AND SYNTHETIC RUBBER
MATERIAL DOCUMENT AND CLASSIFICATIONLS-53,FSCM 71984 MFR REF 1ST MATERIAL RESPONSE OR QQ-A-250/11,T6 FED SPEC 2ND MATERIAL RESPONSE OVERALL
SURFACE TREATMENTANODIZE OVERALL
MATERIALRUBBER FLUOROSILICONE CLASS FQ AND ALUMINUM ALLOY 6061 OVERALL
HOLE DIAMETER0.281 INCHES MINIMUM AND 0.289 INCHES MAXIMUM LOCATION NOT OTHERWISE SPECIFIED IN
GAGE RING THICKNESS0.090 INCHES NOMINAL IN
BOLT CIRCLE DIAMETER5.000 INCHES NOMINAL IN
BOLT HOLE QUANTITY10
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
40312Interchangeable
interchangeable cross-reference
interchangeable
18-142Interchangeable
interchangeable cross-reference
interchangeable
00944233000Interchangeable
interchangeable cross-reference
interchangeable
5412MInterchangeable
interchangeable cross-reference
interchangeable
N45132PC3Interchangeable
interchangeable cross-reference
interchangeable
B40312Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is C3641?
C3641 is a GASKET.
What parts can replace C3641?
There are 9 known substitutes for C3641: 40312, 18-142, 00944233000 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for C3641?
C3641 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-412-9900. This indicates validated use in U.S. government and defense supply chains.
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