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CB28312 — CUP,COMPRESSION

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

CB28312: CUP,COMPRESSION.

The CUP,COMPRESSION is a the manufacturer industrial component. Key specifications include material: RUBBER OVERALL, overall_diameter: 3.5300 INCHES MINIMUM AND 3.5500 INCHES MAXIMUM IN, center_hole_diameter: 0.5000 INCHES MINIMUM AND 0.5100 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-446-9972, 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
CB28312
NSN: 5340-01-446-9972
FSC: 5340 — Hardware, Commercial
CAGE: 03850 — CHICAGO-ALLIS MFG CORP (USA)
SPECIFICATIONS
materialRUBBER OVERALL
overall_diameter3.5300 INCHES MINIMUM AND 3.5500 INCHES MAXIMUM IN
center_hole_diameter0.5000 INCHES MINIMUM AND 0.5100 INCHES MAXIMUM IN
NSN5340-01-446-9972
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: CB28312 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
•
OVERALL DIAMETER: 3.5300 INCHES MINIMUM AND 3.5500 INCHES MAXIMUM IN
•
CENTER HOLE DIAMETER: 0.5000 INCHES MINIMUM AND 0.5100 INCHES MAXIMUM IN
•
MATERIAL: RUBBER OVERALL
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER3.5300 INCHES MINIMUM AND 3.5500 INCHES MAXIMUM IN
CENTER HOLE DIAMETER0.5000 INCHES MINIMUM AND 0.5100 INCHES MAXIMUM IN
MATERIALRUBBER OVERALL
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES 2
VEL/1010160Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
1010160Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is CB28312?
CB28312 is a CUP,COMPRESSION.
What parts can replace CB28312?
There are 2 known substitutes for CB28312: VEL/1010160, 1010160. Substitute compatibility should be verified for your specific system.
What is the NSN for CB28312?
CB28312 is cataloged in the U.S. Government catalog under NSN 5340-01-446-9972. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.