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912120 — HOUSING,BEARING UNIT

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

912120: HOUSING,BEARING UNIT.

The HOUSING,BEARING UNIT is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303SE OVERALL, base_length: 1.376 INCHES NOMINAL IN, bore_diameter: 1.7500 INCHES NOMINAL IN, housing_width: 5.750 INCHES NOMINAL IN, base_thickness: 0.750 INCHES NOMINAL IN, housing_height: 3.120 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 3130-01-212-4800, 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
912120
NSN: 3130-01-212-4800
FSC: 3130 — Bearings, Mounted
CAGE: 3B150 — RAYTHEON COMPANY DBA RAYTHEON CO (USA)
SPECIFICATIONS
materialSTEEL COMP 303SE OVERALL
base_length1.376 INCHES NOMINAL IN
bore_diameter1.7500 INCHES NOMINAL IN
housing_width5.750 INCHES NOMINAL IN
base_thickness0.750 INCHES NOMINAL IN
housing_height3.120 INCHES NOMINAL IN
shaft_end_typeOPEN
style_designatorPILLOW BLOCK, SOLID
surface_treatmentCADMIUM BORE
mounting_hole_typeROUND, UNTHREADED
mounting_hole_diameter0.542 INCHES MINIMUM AND 0.557 INCHES MAXIMUM IN
assembly_overall_length1.500 INCHES NOMINAL IN
NSN3130-01-212-4800
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 912120 · 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
•
LUBRICATION FITTING TYPE: PIPE PLUG
•
ASSEMBLY OVERALL LENGTH: 1.500 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: FIND NO. 4,FSCM 49956 MFR REF SINGLE TREATMENT RESPONSE BORE
•
HOUSING HEIGHT: 3.120 INCHES NOMINAL IN
•
MOUNTING HOLE TYPE: ROUND, UNTHREADED
•
STYLE DESIGNATOR: PILLOW BLOCK, SOLID
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS
LUBRICATION FITTING TYPEPIPE PLUG
ASSEMBLY OVERALL LENGTH1.500 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONFIND NO. 4,FSCM 49956 MFR REF SINGLE TREATMENT RESPONSE BORE
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONFIND NO. 7,FSCM 49956 MFR REF SINGLE TREATMENT RESPONSE HOUSING EXCLUDING BORE
HOUSING HEIGHT3.120 INCHES NOMINAL IN
MOUNTING HOLE TYPEROUND, UNTHREADED
STYLE DESIGNATORPILLOW BLOCK, SOLID
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MOUNTING HOLE DIAMETER0.542 INCHES MINIMUM AND 0.557 INCHES MAXIMUM IN
CENTER TO CENTER DISTANCE BETWEEN MOUNTING HOLES ALONG WIDTH4.500 INCHES NOMINAL IN
OTHER ITEMS IN FSC 3130 — Bearings, Mounted
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
3130-00-001-5118 3130-00-001-5137 3130-00-001-6585 3130-00-003-0422 3130-00-003-0455 3130-00-003-0794 3130-00-003-2802 3130-00-003-9535
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 912120?
912120 is a HOUSING,BEARING UNIT.
What is the NSN for 912120?
912120 is cataloged in the U.S. Government catalog under NSN 3130-01-212-4800. 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.