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BA3980 ✓ 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: ALUMINUM ALLOY 6061 AND RUBBER FLUOROSILICONE CLASS FQ OVERALL, temp_rating: -65.0 CELSIUS AND 350.0 CELSIUS DEGC, hole_diameter: 0.193 INCHES MINIMUM AND 0.201 INCHES MAXIMUM LOCATION NOT OTHERWISE SPECIFIED IN, outside_diameter: 3.500 INCHES NOMINAL IN, aperture_diameter: 2.560 INCHES NOMINAL IN, surface_treatment: ANODIZE OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-891-9366, 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
BA3980
NSN: 5330-00-891-9366
FSC: 5330
CAGE: 95272 — STILLMAN SEAL CORPORATION DIV STILLMAN SEAL CORPERATION (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 6061 AND RUBBER FLUOROSILICONE CLASS FQ OVERALL
temp_rating-65.0 CELSIUS AND 350.0 CELSIUS DEGC
hole_diameter0.193 INCHES MINIMUM AND 0.201 INCHES MAXIMUM LOCATION NOT OTHERWISE SPECIFIED IN
outside_diameter3.500 INCHES NOMINAL IN
aperture_diameter2.560 INCHES NOMINAL IN
surface_treatmentANODIZE OVERALL
bolt_circle_diameter2.875 INCHES NOMINAL IN
elongation_percentage125 MAXIMUM
maximum_pressure_rating180.0 POUNDS PER SQUARE INCH (PSI) LBS
cross-sectional_thickness0.091 INCHES MINIMUM AND 0.105 INCHES MAXIMUM IN
cross-sectional_shape_styleMETAL AND SYNTHETIC RUBBER
material_document_and_classificationQQ-A-250/11 FED SPEC 1ST MATERIAL RESPONSE AND MIL-R-25988 MIL SPEC 2ND MATERIAL RESPONSE OVERALL
NSN5330-00-891-9366
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: BA3980 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
•
BOLT CIRCLE DIAMETER: 2.875 INCHES NOMINAL IN
•
TEMP RATING: -65.0 CELSIUS AND 350.0 CELSIUS DEGC
•
MAXIMUM PRESSURE RATING: 180.0 POUNDS PER SQUARE INCH (PSI) LBS
•
HOLE DIAMETER: 0.193 INCHES MINIMUM AND 0.201 INCHES MAXIMUM LOCATION NOT OTHERWISE SPECIFIED IN
•
SURFACE TREATMENT: ANODIZE OVERALL
•
APERTURE DIAMETER: 2.560 INCHES NOMINAL IN
•
CROSS-SECTIONAL THICKNESS: 0.091 INCHES MINIMUM AND 0.105 INCHES MAXIMUM IN
•
ELONGATION PERCENTAGE: 125 MAXIMUM
TECHNICAL CHARACTERISTICS (FLIS)
BOLT CIRCLE DIAMETER2.875 INCHES NOMINAL IN
TEMP RATING-65.0 CELSIUS AND 350.0 CELSIUS DEGC
MAXIMUM PRESSURE RATING180.0 POUNDS PER SQUARE INCH (PSI) LBS
HOLE DIAMETER0.193 INCHES MINIMUM AND 0.201 INCHES MAXIMUM LOCATION NOT OTHERWISE SPECIFIED IN
SURFACE TREATMENTANODIZE OVERALL
APERTURE DIAMETER2.560 INCHES NOMINAL IN
CROSS-SECTIONAL THICKNESS0.091 INCHES MINIMUM AND 0.105 INCHES MAXIMUM IN
ELONGATION PERCENTAGE125 MAXIMUM
MATERIALALUMINUM ALLOY 6061 AND RUBBER FLUOROSILICONE CLASS FQ OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-250/11 FED SPEC 1ST MATERIAL RESPONSE AND MIL-R-25988 MIL SPEC 2ND MATERIAL RESPONSE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
40-182Interchangeable
interchangeable cross-reference
interchangeable
51914-431Interchangeable
interchangeable cross-reference
interchangeable
LMC3012Interchangeable
interchangeable cross-reference
interchangeable
1203059Interchangeable
interchangeable cross-reference
interchangeable
L504000037Interchangeable
interchangeable cross-reference
interchangeable
PX1252Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is BA3980?
BA3980 is a GASKET.
What parts can replace BA3980?
There are 16 known substitutes for BA3980: 40-182, 51914-431, LMC3012 and 13 more. Substitute compatibility should be verified for your specific system.
What is the NSN for BA3980?
BA3980 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-891-9366. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026