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BA3959 ✓ 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 OVERALL, temp_rating: -65.0 FAHRENHEIT AND 350.0 FAHRENHEIT DEGF, gage_thickness: 0.077 INCHES MINIMUM AND 0.083 INCHES MAXIMUM IN, surface_treatment: ANODIZE OVERALL, center_to_center_distance: 0.146 INCHES MINIMUM AND 0.161 INCHES MAXIMUM IN, cross-sectional_thickness: 0.125 INCHES MINIMUM AND 0.139 INCHES MAXIMUM 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 5330-00-842-8275, 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
BA3959
NSN: 5330-00-842-8275
FSC: 5330
CAGE: 95272 — STILLMAN SEAL CORPORATION DIV STILLMAN SEAL CORPERATION (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 6061 OVERALL
temp_rating-65.0 FAHRENHEIT AND 350.0 FAHRENHEIT DEGF
gage_thickness0.077 INCHES MINIMUM AND 0.083 INCHES MAXIMUM IN
surface_treatmentANODIZE OVERALL
center_to_center_distance0.146 INCHES MINIMUM AND 0.161 INCHES MAXIMUM IN
cross-sectional_thickness0.125 INCHES MINIMUM AND 0.139 INCHES MAXIMUM IN
cross-sectional_shape_styleMETAL
material_document_and_classificationQQ-A-250/11 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationMIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5330-00-842-8275
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: BA3959 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
MATERIAL: ALUMINUM ALLOY 6061 OVERALL
•
CROSS-SECTIONAL THICKNESS: 0.125 INCHES MINIMUM AND 0.139 INCHES MAXIMUM IN
•
GAGE THICKNESS: 0.077 INCHES MINIMUM AND 0.083 INCHES MAXIMUM IN
•
CROSS-SECTIONAL SHAPE STYLE: METAL
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-250/11 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
CENTER TO CENTER DISTANCE: 0.146 INCHES MINIMUM AND 0.161 INCHES MAXIMUM IN
•
SURFACE TREATMENT: ANODIZE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
MATERIALALUMINUM ALLOY 6061 OVERALL
CROSS-SECTIONAL THICKNESS0.125 INCHES MINIMUM AND 0.139 INCHES MAXIMUM IN
GAGE THICKNESS0.077 INCHES MINIMUM AND 0.083 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLEMETAL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-250/11 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
CENTER TO CENTER DISTANCE0.146 INCHES MINIMUM AND 0.161 INCHES MAXIMUM IN
SURFACE TREATMENTANODIZE OVERALL
TEMP RATING-65.0 FAHRENHEIT AND 350.0 FAHRENHEIT DEGF
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
380-1Interchangeable
interchangeable cross-reference
interchangeable
6GP80-1PL1542Interchangeable
interchangeable cross-reference
interchangeable
380-1 PL0671Interchangeable
interchangeable cross-reference
interchangeable
40173Interchangeable
interchangeable cross-reference
interchangeable
5284423Interchangeable
interchangeable cross-reference
interchangeable
5284505Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is BA3959?
BA3959 is a GASKET.
What parts can replace BA3959?
There are 18 known substitutes for BA3959: 380-1, 6GP80-1PL1542, 380-1 PL0671 and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for BA3959?
BA3959 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-842-8275. This indicates validated use in U.S. government and defense supply chains.
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Last verified: July 2026