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A-1339 ✓ 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 SEAL,FELT is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, thickness: 0.375 INCHES NOMINAL IN, case_style: SQUARE, seal_width: 0.423 INCHES MINIMUM AND 0.453 INCHES MAXIMUM IN, design_form: DOUBLE-ENDED, temp_rating: -65.0 FAHRENHEIT AND 225.0 FAHRENHEIT DEGF. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-641-4510, 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
A-1339
NSN: 5330-00-641-4510
FSC: 5330
CAGE: 61208 — TWIN DISC, INCORPORATED DBA TWIN DISC MID-ATLANTIC (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
thickness0.375 INCHES NOMINAL IN
case_styleSQUARE
seal_width0.423 INCHES MINIMUM AND 0.453 INCHES MAXIMUM IN
design_formDOUBLE-ENDED
temp_rating-65.0 FAHRENHEIT AND 225.0 FAHRENHEIT DEGF
thread_size0.562-18 LOCATION NOT OTHERWISE SPECIFIED
thread_class2A LOCATION NOT OTHERWISE SPECIFIED A
overall_width0.656 INCHES NOMINAL IN
overall_length2.906 INCHES NOMINAL IN
furnished_itemsSEAT LOCATION NOT OTHERWISE SPECIFIED
connection_styleFLARELESS LOCATION NOT OTHERWISE SPECIFIED
NSN5330-00-641-4510
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: A-1339 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
A1339Interchangeable
interchangeable cross-reference
interchangeable
11339Interchangeable
interchangeable cross-reference
interchangeable
6B0170Interchangeable
Same NIIN cross-reference
interchangeable
PUF1166Interchangeable
Same NIIN cross-reference
interchangeable
PI1501Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A-1339?
A-1339 is a SEAL,FELT.
What parts can replace A-1339?
There are 5 known substitutes for A-1339: A1339, 11339, 6B0170 and 2 more. Substitute compatibility should be verified for your specific system.
Is A-1339 still available?
A-1339 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