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B1339 — B1339

✓ Government record, cited
— · MRO · MRO_GENERAL
PRODUCT OVERVIEW

B1339: B1339.

The B1339 is a the manufacturer industrial component. Key specifications include material: ASBESTOS AND RUBBER CHLOROPRENE CLASS CR OVERALL, hole_diameter: 0.406 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, overall_width: 3.063 INCHES NOMINAL IN, style_designator: NON-CIRCULAR, aperture_diameter: 1.250 INCHES NOMINAL IN, bolt_circle_diameter: 2.375 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-413-4857, 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
MRO→ MRO_GENERAL→ B1339
NSN: 5330-00-413-4857
NIINs: 004134857, 015658959
FSC: 5330 — Packing and Gasket Materials
CAGE: 64104 — DRESSER, LLC (USA)
SPECIFICATIONS
materialASBESTOS AND RUBBER CHLOROPRENE CLASS CR OVERALL
hole_diameter0.406 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
overall_width3.063 INCHES NOMINAL IN
style_designatorNON-CIRCULAR
aperture_diameter1.250 INCHES NOMINAL IN
bolt_hole_quantity2
bolt_circle_diameter2.375 INCHES NOMINAL IN
outside_corner_radius0.344 INCHES NOMINAL IN
cross-sectional_thickness0.031 INCHES NOMINAL IN
cross-sectional_shape_styleSOLID SINGLE OR COMPOSITION
side_radius_from_gasket_center0.938 INCHES NOMINAL IN
material_document_and_classificationMIL-G-12803,+1252-A MIL SPEC ALL MATERIAL RESPONSES OVERALL
NSN5330-00-413-4857
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: B1339 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: 0.031 INCHES NOMINAL IN
•
SIDE RADIUS FROM GASKET CENTER: 0.938 INCHES NOMINAL IN
•
STYLE DESIGNATOR: NON-CIRCULAR
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-G-12803,+1252-A MIL SPEC ALL MATERIAL RESPONSES OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
•
APERTURE DIAMETER: 1.250 INCHES NOMINAL IN
•
BOLT HOLE QUANTITY: 2
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL THICKNESS0.031 INCHES NOMINAL IN
SIDE RADIUS FROM GASKET CENTER0.938 INCHES NOMINAL IN
STYLE DESIGNATORNON-CIRCULAR
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-G-12803,+1252-A MIL SPEC ALL MATERIAL RESPONSES OVERALL
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
OVERALL WIDTH3.063 INCHES NOMINAL IN
APERTURE DIAMETER1.250 INCHES NOMINAL IN
BOLT HOLE QUANTITY2
BOLT CIRCLE DIAMETER2.375 INCHES NOMINAL IN
OUTSIDE CORNER RADIUS0.344 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is B1339?
B1339 is a B1339. It is classified as a MRO (MRO_GENERAL).
What is the NSN for B1339?
B1339 is cataloged in the U.S. Government catalog under NSN 5330-00-413-4857. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.