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PartsTable / COMPONENT / 203781
203781 ✓ 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 BEARING,ROLLER,NEEDLE is a the manufacturer industrial component. Key specifications include overall_diameter: 0.656 INCHES NOMINAL IN, peripheral_shape_style: ROUND, end_item_identification: ENERGY ABSORBER ASSEMBLY. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-004-3384, 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
203781
NSN: 5330-00-004-3384
FSC: 5330
CAGE: 61208 — TWIN DISC, INCORPORATED DBA TWIN DISC MID-ATLANTIC (USA)
SPECIFICATIONS
overall_diameter0.656 INCHES NOMINAL IN
peripheral_shape_styleROUND
end_item_identificationENERGY ABSORBER ASSEMBLY
NSN5330-00-004-3384
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 203781 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
•
SUPPLEMENTARY FEATURES: CROSS-SECTIONAL SHAPE STYLE:NO.195 IRREGULAR SHAPE FROM FIIG A03200
TECHNICAL CHARACTERISTICS (FLIS)
SUPPLEMENTARY FEATURESCROSS-SECTIONAL SHAPE STYLE:NO.195 IRREGULAR SHAPE FROM FIIG A03200
SPECIAL FEATURESSTYLE DESIGNATOR:NO.60 IRREGULAR SHAPE FROM FIIG A03200
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
GB34Interchangeable
interchangeable cross-reference
interchangeable
GB34XInterchangeable
interchangeable cross-reference
interchangeable
205627-6Interchangeable
interchangeable cross-reference
interchangeable
20378-1Interchangeable
interchangeable cross-reference
interchangeable
44834-26Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 203781?
203781 is a BEARING,ROLLER,NEEDLE.
What parts can replace 203781?
There are 5 known substitutes for 203781: GB34, GB34X, 205627-6 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 203781?
203781 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-004-3384. 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