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B549 — COUPLER,OPTOELECTRONIC

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

B549: COUPLER,OPTOELECTRONIC.

The COUPLER,OPTOELECTRONIC is a the manufacturer industrial component. Key specifications include body_width: 1.000 INCHES MAXIMUM IN, body_height: 1.375 INCHES MAXIMUM IN, body_length: 1.000 INCHES MAXIMUM IN, bore_diameter: 3.0625 INCHES NOMINAL IN, inclosure_type: HERMETICALLY SEALED, load_direction: RADIAL. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-198-0332, 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
B549
NSN: 3110-00-198-0332
NIINs: 001980332, 010137691, 011987923
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 21760 — SCHATZ BEARING CORPORATION DBA SCHATZ BEARING CORP (USA)
SPECIFICATIONS
body_width1.000 INCHES MAXIMUM IN
body_height1.375 INCHES MAXIMUM IN
body_length1.000 INCHES MAXIMUM IN
bore_diameter3.0625 INCHES NOMINAL IN
inclosure_typeHERMETICALLY SEALED
load_directionRADIAL
overall_height1.675 INCHES MAXIMUM IN
mounting_methodTHREADED HOLE(S) SINGLE GROUP
frequency_rating400.0 HERTZ NOMINAL SINGLE COMPONENT
inner_ring_width0.3750 INCHES NOMINAL IN
outer_ring_width0.3120 INCHES NOMINAL IN
special_features0.3750 IN. NOM O/A WIDTH IN
NSN3110-00-198-0332
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: B549 · OEM ⚠ VERIFY BEFORE ORDERING Cup and cone sold separately — verify you are ordering BOTH parts or the correct component. Always replace cup and cone together — mismatched wear = premature failure ✓ BROKER TIP Taper angle determines axial load capacity. Steeper angle = higher axial load rating. Timken series numbers indicate dimensions — cross-reference carefully PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
OUTER RING WIDTH: 0.3120 INCHES NOMINAL IN
•
OVERALL OUTSIDE DIAMETER: 3.8750 INCHES NOMINAL IN
•
LOAD DIRECTION: RADIAL
•
BORE DIAMETER: 3.0625 INCHES NOMINAL IN
•
INNER RING WIDTH: 0.3750 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OUTER RING WIDTH0.3120 INCHES NOMINAL IN
OVERALL OUTSIDE DIAMETER3.8750 INCHES NOMINAL IN
LOAD DIRECTIONRADIAL
SPECIAL FEATURES0.3750 IN. NOM O/A WIDTH IN
BORE DIAMETER3.0625 INCHES NOMINAL IN
INNER RING WIDTH0.3750 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is B549?
B549 is a COUPLER,OPTOELECTRONIC.
What is the NSN for B549?
B549 is cataloged in the U.S. Government catalog under NSN 3110-00-198-0332. 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.