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Technical Data Sheet
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212733-1 — HOUSING,BEARING UNIT

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

212733-1: HOUSING,BEARING UNIT.

The HOUSING,BEARING UNIT is a the manufacturer industrial component. Key specifications include housing_length: 1.625 INCHES NOMINAL IN, housing_diameter: 5.750 INCHES NOMINAL IN, style_designator: FLANGE BLOCK, bolt_circle_diameter: 5.125 INCHES NOMINAL IN, end_item_identification: 2590-01-268-8229 AUXILIARY POWER UNIT, overall_outside_diameter: 5.750 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 3130-01-326-8001, 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
212733-1
NSN: 3130-01-326-8001
NIINs: 013268001, 013574481
FSC: 3130 — Bearings, Mounted
CAGE: 51913 — WALKER POWER SYSTEMS, INC. DBA TIERNAY TURBINES (USA)
SPECIFICATIONS
housing_length1.625 INCHES NOMINAL IN
housing_diameter5.750 INCHES NOMINAL IN
style_designatorFLANGE BLOCK
bolt_circle_diameter5.125 INCHES NOMINAL IN
end_item_identification2590-01-268-8229 AUXILIARY POWER UNIT
overall_outside_diameter5.750 INCHES NOMINAL IN
NSN3130-01-326-8001
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 212733-1 · OEM ⚠ VERIFY BEFORE ORDERING ABEC grade: higher = tighter tolerance = higher cost. ABEC-1 is standard, ABEC-7+ for precision spindles. Open, shielded (ZZ), and sealed (2RS) versions have different max RPM ratings ✓ BROKER TIP 2RS = sealed for life (no maintenance). ZZ = shielded, re-greaseable. Open = must lubricate on install. Common interchange: 6205-2RS = 6205-2RSR = 6205-DDU (same bearing, different suffix) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
STYLE DESIGNATOR: FLANGE BLOCK
•
OVERALL OUTSIDE DIAMETER: 5.750 INCHES NOMINAL IN
•
BOLT CIRCLE DIAMETER: 5.125 INCHES NOMINAL IN
•
HOUSING LENGTH: 1.625 INCHES NOMINAL IN
•
HOUSING DIAMETER: 5.750 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORFLANGE BLOCK
OVERALL OUTSIDE DIAMETER5.750 INCHES NOMINAL IN
BOLT CIRCLE DIAMETER5.125 INCHES NOMINAL IN
END ITEM IDENTIFICATION2590-01-268-8229 AUXILIARY POWER UNIT
HOUSING LENGTH1.625 INCHES NOMINAL IN
HOUSING DIAMETER5.750 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 1
273120Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 212733-1?
212733-1 is a HOUSING,BEARING UNIT.
What parts can replace 212733-1?
There is 1 known substitute for 212733-1: 273120. Substitute compatibility should be verified for your specific system.
What is the NSN for 212733-1?
212733-1 is cataloged in the U.S. Government catalog under NSN 3130-01-326-8001. 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.