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PartsTable / COMPONENT / X9994A ITEM B3331
X9994A ITEM B3331 ✓ 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 color: GRAY/GREY, material: IRON OVERALL, peripheral_diameter: 4.370 INCHES NOMINAL IN, center_hole_diameter: 2.000 INCHES NOMINAL IN, cross-sectional_height: 0.640 INCHES NOMINAL IN, cross-sectional_shape_style: FLANGE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-352-7777, 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
X9994A ITEM B3331
NSN: 5330-01-352-7777
FSC: 5330
CAGE: 61208 — TWIN DISC, INCORPORATED DBA TWIN DISC MID-ATLANTIC (USA)
SPECIFICATIONS
colorGRAY/GREY
materialIRON OVERALL
peripheral_diameter4.370 INCHES NOMINAL IN
center_hole_diameter2.000 INCHES NOMINAL IN
cross-sectional_height0.640 INCHES NOMINAL IN
cross-sectional_shape_styleFLANGE
NSN5330-01-352-7777
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: X9994A ITEM B3331 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
•
PERIPHERAL DIAMETER: 4.370 INCHES NOMINAL IN
•
MATERIAL: IRON OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: FLANGE
•
CROSS-SECTIONAL HEIGHT: 0.640 INCHES NOMINAL IN
•
CENTER HOLE DIAMETER: 2.000 INCHES NOMINAL IN
•
COLOR: GRAY/GREY
TECHNICAL CHARACTERISTICS (FLIS)
PERIPHERAL DIAMETER4.370 INCHES NOMINAL IN
MATERIALIRON OVERALL
CROSS-SECTIONAL SHAPE STYLEFLANGE
CROSS-SECTIONAL HEIGHT0.640 INCHES NOMINAL IN
CENTER HOLE DIAMETER2.000 INCHES NOMINAL IN
COLORGRAY/GREY
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
850279Interchangeable
interchangeable cross-reference
interchangeable
FC2108Interchangeable
interchangeable cross-reference
interchangeable
4984152-1Interchangeable
interchangeable cross-reference
interchangeable
B3331Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is X9994A ITEM B3331?
X9994A ITEM B3331 is a RETAINER,PACKING.
What parts can replace X9994A ITEM B3331?
There are 4 known substitutes for X9994A ITEM B3331: 850279, FC2108, 4984152-1 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for X9994A ITEM B3331?
X9994A ITEM B3331 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-352-7777. 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