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Technical Data Sheet
PartsTable / COMPONENT / 2121-482PCU3
2121-482PCU3 ✓ 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 PACKING ASSEMBLY is a the manufacturer industrial component. Key specifications include height: 4.938 INCHES NOMINAL IN, material: COTTON OR RUBBER SYNTHETIC INTERMEDIATE RING, joint_type: BUTT BOTTOM RING, inside_diameter: 4.500 INCHES NOMINAL IN, outside_diameter: 5.500 INCHES NOMINAL IN, cross-sectional_shape_style: O-RING BOTTOM RING. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-248-4688, 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
2121-482PCU3
NSN: 5330-00-248-4688
FSC: 5330
CAGE: 81316 — PORTSMOUTH NAVAL SHIPYARD (USA)
SPECIFICATIONS
height4.938 INCHES NOMINAL IN
materialCOTTON OR RUBBER SYNTHETIC INTERMEDIATE RING
joint_typeBUTT BOTTOM RING
inside_diameter4.500 INCHES NOMINAL IN
outside_diameter5.500 INCHES NOMINAL IN
intermediate_ring_quantity8
cross-sectional_shape_styleO-RING BOTTOM RING
nondefinitive_spec/std_data2 TYPE
NSN5330-00-248-4688
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 2121-482PCU3 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
•
CROSS-SECTIONAL SHAPE STYLE: FLANGE INTERMEDIATE RING
•
MATERIAL: COTTON OR RUBBER SYNTHETIC TOP RING
•
JOINT TYPE: BUTT INTERMEDIATE RING
•
NONDEFINITIVE SPEC/STD DATA: 2 TYPE
•
OUTSIDE DIAMETER: 5.500 INCHES NOMINAL IN
•
INTERMEDIATE RING QUANTITY: 8
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL SHAPE STYLEFLANGE INTERMEDIATE RING
MATERIALCOTTON OR RUBBER SYNTHETIC TOP RING
JOINT TYPEBUTT INTERMEDIATE RING
JOINT TYPEBUTT TOP RING
NONDEFINITIVE SPEC/STD DATA2 TYPE
OUTSIDE DIAMETER5.500 INCHES NOMINAL IN
JOINT TYPEBUTT BOTTOM RING
INTERMEDIATE RING QUANTITY8
MATERIALCOTTON OR RUBBER SYNTHETIC INTERMEDIATE RING
CROSS-SECTIONAL SHAPE STYLEO-RING BOTTOM RING
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
DM-184Interchangeable
interchangeable cross-reference
interchangeable
328090Interchangeable
interchangeable cross-reference
interchangeable
BP1625Interchangeable
interchangeable cross-reference
interchangeable
70227Interchangeable
interchangeable cross-reference
interchangeable
X2139-6Interchangeable
interchangeable cross-reference
interchangeable
A2329Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 2121-482PCU3?
2121-482PCU3 is a PACKING ASSEMBLY.
What parts can replace 2121-482PCU3?
There are 10 known substitutes for 2121-482PCU3: DM-184, 328090, BP1625 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 2121-482PCU3?
2121-482PCU3 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-248-4688. 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