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Technical Data Sheet

MIL-B-81934/2 — BEARING,PLAIN,SELF-ALIGNING

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

MIL-B-81934/2: BEARING,PLAIN,SELF-ALIGNING.

The BEARING,PLAIN,SELF-ALIGNING is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2024 OUTER LAYER, corner_shape: UNDERCUT LEFT FLANGE BODY CORNER, flange_width: 0.0575 INCHES MINIMUM AND 0.0625 INCHES MAXIMUM IN, overall_length: 0.3287 INCHES MINIMUM AND 0.3437 INCHES MAXIMUM IN, style_designator: SOLID, EXTERNAL FLANGE ONE END, surface_treatment: ANODIZE OR CHROMATE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 3120-01-024-9819, 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
MIL-B-81934/2
NSN: 3120-01-024-9819
NIINs: 010249819, 010255817, 010256485, 010286629, 010297011, 010297012, 010304716, 010378957, 010397603, 010397607, 010402128, 010412028, 010417126, 010419738, 010430084, 010430085, 010431468, 010780969, 010846103, 010846104, 010846105, 010849241, 010863605, 010875824, 010877057, 010877058, 010992630, 011068263, 011073663, 011073664, 011082573, 011092277, 011100090, 011121796, 011122479, 011124434, 011128738, 011139915, 011208212, 011209972, 011209973, 011210435, 011218575, 011236474, 011261298, 011265317, 011268867, 011273835, 011306159, 011312995, 011312996, 011312998, 011316838, 011319514, 011321128, 011321129, 011321130, 011331178, 011339542, 011340797, 011426355, 011437493, 011437494, 011638331, 011664429, 011703240, 011794914, 011851928, 011854725, 011863510, 011864034, 011866880, 011878954, 011878955, 011931701, 011931702, 011945785, 011962845, 011965532, 011965603, 011966396, 012016926, 012062915, 012072023, 012098146, 012100513, 012211859, 012255780, 012290018, 012292058, 012292060, 012323563, 012325675, 012346422, 012346423, 012365609, 012381898, 012387106, 012530475, 012535338, 012535339, 012542604, 012646000, 012665058, 012680916, 012726579, 012810940, 012820945, 012865481, 013049595, 013052642, 013062716, 013063564, 013260041, 013264725, 013321422, 013326456, 013327406, 013336515, 013340595, 013369044, 013382879, 013385747, 013431015, 013548267, 013548269, 013548270, 013548273, 013548274, 013548275, 013548276, 013548277, 013548278, 013552744, 013607029, 013749852, 013840149, 014091003, 014395601, 014395605, 014468802, 014615630, 014927477, 015248107, 015917490
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialALUMINUM ALLOY 2024 OUTER LAYER
corner_shapeUNDERCUT LEFT FLANGE BODY CORNER
flange_width0.0575 INCHES MINIMUM AND 0.0625 INCHES MAXIMUM IN
overall_length0.3287 INCHES MINIMUM AND 0.3437 INCHES MAXIMUM IN
style_designatorSOLID, EXTERNAL FLANGE ONE END
surface_treatmentANODIZE OR CHROMATE OVERALL
body_inside_diameter0.5630 INCHES MINIMUM AND 0.5640 INCHES MAXIMUM IN
body_outside_diameter0.6887 INCHES MINIMUM AND 0.6892 INCHES MAXIMUM IN
end_item_identificationASTOR RADAR
flange_outside_diameter1.1050 INCHES MINIMUM AND 1.1250 INCHES MAXIMUM IN
material_document_and_classificationQQ-A-200/3 T8511 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-225/6 T851 FED SPEC SINGLE MATERIAL RESPONSE OUTER LAYER
surface_treatment_document_and_classificationMIL-A-8625 T1 IR T2 MIL SPEC 1ST TREATMENT RESPONSE OR MIL-C-5541 MIL SPEC 2ND TREATMENT RESPONSE OVERALL
NSN3120-01-024-9819
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: MIL-B-81934/2 · 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
•
CORNER SHAPE: SQUARE INSIDE RIGHT CORNER
•
FLANGE OUTSIDE DIAMETER: 1.3550 INCHES MINIMUM AND 1.3750 INCHES MAXIMUM IN
•
BODY OUTSIDE DIAMETER: 0.8762 INCHES MINIMUM AND 0.8772 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
CORNER SHAPESQUARE INSIDE RIGHT CORNER
CORNER SHAPESQUARE OUTSIDE RIGHT CORNER
CORNER SHAPESQUARE OUTSIDE LEFT CORNER
CORNER SHAPESQUARE LEFT FLANGE OUTSIDE RIGHT CORNER
CORNER SHAPESQUARE INSIDE LEFT CORNER
CORNER SHAPEUNDERCUT LEFT FLANGE BODY CORNER
FLANGE OUTSIDE DIAMETER1.3550 INCHES MINIMUM AND 1.3750 INCHES MAXIMUM IN
BODY OUTSIDE DIAMETER0.8762 INCHES MINIMUM AND 0.8772 INCHES MAXIMUM IN
STYLE DESIGNATORSOLID, EXTERNAL FLANGE ONE END
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5643 ASSN STD SINGLE MATERIAL RESPONSE OUTER LAYER
SUBSTITUTES & CROSS-REFERENCES 9
FBJW22TF-11A012Reference document
Same NSN cross-reference
Reference document — Secondary reference
FBRR-11A012Reference document
Same NSN cross-reference
Reference document — Secondary reference
SAE/AS81934/02Reference document
Same NSN cross-reference
Reference document — Secondary reference
ADLF11A012Reference document
Same NSN cross-reference
Reference document — Secondary reference
123-0211A012Reference document
Same NSN cross-reference
Reference document — Secondary reference
91087-11A012Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MIL-B-81934/2?
MIL-B-81934/2 is a BEARING,PLAIN,SELF-ALIGNING.
What parts can replace MIL-B-81934/2?
There are 9 known substitutes for MIL-B-81934/2: FBJW22TF-11A012, FBRR-11A012, SAE/AS81934/02 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MIL-B-81934/2?
MIL-B-81934/2 is cataloged in the U.S. Government catalog under NSN 3120-01-024-9819. 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.