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Technical Data Sheet
PartsTable / COMPONENT / 71309-A
71309-A ✓ 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 BUTADIENE-STYRENE CLASS SBR OVERALL, hole_diameter: 0.312 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, overall_width: 4.750 INCHES NOMINAL IN, aperture_width: 3.500 INCHES NOMINAL IN, overall_length: 5.000 INCHES NOMINAL IN, aperture_length: 4.250 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-085-3260, 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
71309-A
NSN: 5330-01-085-3260
FSC: 5330
CAGE: 95402 — ELECTRIC BOAT CORP DBA ELECTRO DYNAMIC (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-STYRENE CLASS SBR OVERALL
hole_diameter0.312 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
overall_width4.750 INCHES NOMINAL IN
aperture_width3.500 INCHES NOMINAL IN
overall_length5.000 INCHES NOMINAL IN
aperture_length4.250 INCHES NOMINAL IN
bolt_hole_quantity2
cross-sectional_thickness0.125 INCHES NOMINAL IN
cross-sectional_shape_styleSOLID SINGLE OR COMPOSITION
material_document_and_classificationMIL-G-1149,TY 1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
center_to_center_distance_between_bolt_holes_along_length4.250 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
NSN5330-01-085-3260
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 71309-A 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
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-G-1149,TY 1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
APERTURE WIDTH: 3.500 INCHES NOMINAL IN
•
CROSS-SECTIONAL THICKNESS: 0.125 INCHES NOMINAL IN
•
MATERIAL: RUBBER BUTADIENE-STYRENE CLASS SBR OVERALL
•
BOLT HOLE QUANTITY: 2
•
CENTER TO CENTER DISTANCE BETWEEN BOLT HOLES ALONG LENGTH: 4.250 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-G-1149,TY 1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
OVERALL LENGTH5.000 INCHES NOMINAL IN
APERTURE WIDTH3.500 INCHES NOMINAL IN
CROSS-SECTIONAL THICKNESS0.125 INCHES NOMINAL IN
MATERIALRUBBER BUTADIENE-STYRENE CLASS SBR OVERALL
BOLT HOLE QUANTITY2
CENTER TO CENTER DISTANCE BETWEEN BOLT HOLES ALONG LENGTH4.250 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
OVERALL WIDTH4.750 INCHES NOMINAL IN
APERTURE LENGTH4.250 INCHES NOMINAL IN
HOLE DIAMETER0.312 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
XLS3Interchangeable
interchangeable cross-reference
interchangeable
SMA586381Interchangeable
interchangeable cross-reference
interchangeable
177039-14Interchangeable
interchangeable cross-reference
interchangeable
M0DEL11609Interchangeable
interchangeable cross-reference
interchangeable
13H3103LTInterchangeable
interchangeable cross-reference
interchangeable
A3105612Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 71309-A?
71309-A is a GASKET.
What parts can replace 71309-A?
There are 23 known substitutes for 71309-A: XLS3, SMA586381, 177039-14 and 20 more. Substitute compatibility should be verified for your specific system.
Is 71309-A still available?
71309-A is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026