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A20189 — BEARING,ROLLER,TAPERED

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

A20189: BEARING,ROLLER,TAPERED.

The BEARING,ROLLER,TAPERED is a the manufacturer tape media or drive component used in enterprise backup, archival, and disaster recovery environments. Key specifications include material: STEEL OVERALL, cup_width: 2.1250 INCHES NOMINAL IN, cone_width: 1.1542 INCHES NOMINAL IN, bore_diameter: 2.2500 INCHES MINIMUM AND 2.2505 INCHES MAXIMUM IN, overall_width: 2.5626 INCHES MINIMUM AND 2.5786 INCHES MAXIMUM IN, standout_width: 0.2188 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-533-6554, 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
A20189
NSN: 5340-00-533-6554
NIINs: 005336554, 009453009, 013155572
FSC: 5340 — Hardware, Commercial
CAGE: U4574 — FNH UK LTD (GBR)
SPECIFICATIONS
materialSTEEL OVERALL
cup_width2.1250 INCHES NOMINAL IN
cone_width1.1542 INCHES NOMINAL IN
bore_diameter2.2500 INCHES MINIMUM AND 2.2505 INCHES MAXIMUM IN
overall_width2.5626 INCHES MINIMUM AND 2.5786 INCHES MAXIMUM IN
standout_width0.2188 INCHES NOMINAL IN
style_designatorSTRAIGHT BORE, DOUBLE CUP, SINGLE CONES
cone_corner_radius0.1400 INCHES NOMINAL IN
backface_corner_radius0.0300 INCHES NOMINAL IN
overall_outside_diameter4.2500 INCHES MINIMUM AND 4.2510 INCHES MAXIMUM IN
NSN5340-00-533-6554
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: A20189 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
•
SHAFT ACCOMMODATION STYLE: ROUND
•
MOUNTING METHOD: PLAIN SHAFT ACCOMMODATION
•
STYLE DESIGNATOR: CYLINDRICAL
•
OUTSIDE DIAMETER: 1.562 INCHES NOMINAL IN
•
INSIDE DIAMETER: 0.453 INCHES NOMINAL IN
•
GRIPPING SURFACE CONDITION: GRIP AID
TYPICAL APPLICATIONS
  • Long-term data archival and compliance retention
  • Offsite backup and disaster recovery
  • Air-gapped ransomware protection
  • Cold storage tier for infrequently accessed data
TECHNICAL CHARACTERISTICS
SHAFT ACCOMMODATION STYLEROUND
MOUNTING METHODPLAIN SHAFT ACCOMMODATION
STYLE DESIGNATORCYLINDRICAL
OVERALL LENGTH4.125 INCHES NOMINAL IN
OUTSIDE DIAMETER1.562 INCHES NOMINAL IN
INSIDE DIAMETER0.453 INCHES NOMINAL IN
GRIPPING SURFACE CONDITIONGRIP AID
SPECIAL FEATURESFLUTED PERIPHERY 4.125 IN. O/A LG 1.563 IN. OD,0.453 IN. ID IN
ACCOMMODATED SHAFT DIAMETER1.375 INCHES NOMINAL IN
SURFACE TREATMENTOXIDE OVERALL
SUBSTITUTES & CROSS-REFERENCES 1
A10896Same 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 A20189?
A20189 is a BEARING,ROLLER,TAPERED.
What parts can replace A20189?
There is 1 known substitute for A20189: A10896. Substitute compatibility should be verified for your specific system.
What is the NSN for A20189?
A20189 is cataloged in the U.S. Government catalog under NSN 5340-00-533-6554. 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.