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PartsTable / COMPONENT / X999A ITEM B2104
X999A ITEM B2104 ✓ 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 RETAINER,PACKING is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, peripheral_diameter: 2.180 INCHES NOMINAL IN, cross-sectional_height: 0.160 INCHES NOMINAL IN, cross-sectional_shape_style: SPECIAL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-352-7778, 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
X999A ITEM B2104
NSN: 5330-01-352-7778
FSC: 5330
CAGE: 61208 — TWIN DISC, INCORPORATED DBA TWIN DISC MID-ATLANTIC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
peripheral_diameter2.180 INCHES NOMINAL IN
cross-sectional_height0.160 INCHES NOMINAL IN
cross-sectional_shape_styleSPECIAL
NSN5330-01-352-7778
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: X999A ITEM B2104 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: STEEL OVERALL
•
PERIPHERAL DIAMETER: 2.180 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: SPECIAL
•
CROSS-SECTIONAL HEIGHT: 0.160 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL OVERALL
PERIPHERAL DIAMETER2.180 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLESPECIAL
CROSS-SECTIONAL HEIGHT0.160 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
4300106-001Interchangeable
interchangeable cross-reference
interchangeable
501B2104Interchangeable
interchangeable cross-reference
interchangeable
C218265-4Interchangeable
interchangeable cross-reference
interchangeable
2HC112Interchangeable
interchangeable cross-reference
interchangeable
B2104Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is X999A ITEM B2104?
X999A ITEM B2104 is a RETAINER,PACKING.
What parts can replace X999A ITEM B2104?
There are 5 known substitutes for X999A ITEM B2104: 4300106-001, 501B2104, C218265-4 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for X999A ITEM B2104?
X999A ITEM B2104 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-352-7778. 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