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691643 — FILTER ELEMENT,AIR CONDITIONING

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

691643: FILTER ELEMENT,AIR CONDITIONING.

FILTER ELEMENT,AIR CONDITIONING. Key specifications include material: COPPER ALLOY OVERALL, corner_shape: SQUARE ALL CORNERS, hole_diameter: 0.1260 INCHES NOMINAL FIRST IN, overall_length: 0.8500 INCHES MINIMUM AND 0.8600 INCHES MAXIMUM IN, surface_finish: 16.0 MICROINCHES INSIDE DIAMETER SURFACE OF BODY, style_designator: SPLIT, PLAIN, NO OUTSIDE FLANGES. This part is cataloged in the U.S.

Government catalog under NSN 3120-00-342-6664, 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
691643
NSN: 3120-00-342-6664
NIINs: 003426664, 014853733
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 81205 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
corner_shapeSQUARE ALL CORNERS
hole_diameter0.1260 INCHES NOMINAL FIRST IN
overall_length0.8500 INCHES MINIMUM AND 0.8600 INCHES MAXIMUM IN
surface_finish16.0 MICROINCHES INSIDE DIAMETER SURFACE OF BODY
style_designatorSPLIT, PLAIN, NO OUTSIDE FLANGES
surface_treatmentLEAD AND TIN OVERALL
body_inside_diameter1.2518 INCHES MINIMUM AND 1.2527 INCHES MAXIMUM IN
body_outside_diameter1.4993 INCHES MINIMUM AND 1.5002 INCHES MAXIMUM IN
lubricant_accommodation_styleGROOVED CIRCULAR
antirotation/lubrication_type_and_quantity6 HOLE
NSN3120-00-342-6664
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 691643 · 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
•
SURFACE FINISH: 16.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF BODY
•
CORNER SHAPE: SQUARE ALL CORNERS
•
BODY OUTSIDE DIAMETER: 1.4993 INCHES MINIMUM AND 1.5002 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: SPLIT, PLAIN, NO OUTSIDE FLANGES
•
BODY INSIDE DIAMETER: 1.2518 INCHES MINIMUM AND 1.2527 INCHES MAXIMUM IN
•
LUBRICANT ACCOMMODATION STYLE: GROOVED CIRCULAR
TECHNICAL CHARACTERISTICS
SURFACE FINISH16.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF BODY
SURFACE FINISH16.0 MICROINCHES INSIDE DIAMETER SURFACE OF BODY
CORNER SHAPESQUARE ALL CORNERS
BODY OUTSIDE DIAMETER1.4993 INCHES MINIMUM AND 1.5002 INCHES MAXIMUM IN
STYLE DESIGNATORSPLIT, PLAIN, NO OUTSIDE FLANGES
OVERALL LENGTH0.8500 INCHES MINIMUM AND 0.8600 INCHES MAXIMUM IN
BODY INSIDE DIAMETER1.2518 INCHES MINIMUM AND 1.2527 INCHES MAXIMUM IN
LUBRICANT ACCOMMODATION STYLEGROOVED CIRCULAR
SURFACE TREATMENTLEAD AND TIN OVERALL
ANTIROTATION/LUBRICATION TYPE AND QUANTITY6 HOLE
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 691643?
691643 is a FILTER ELEMENT,AIR CONDITIONING.
What is the NSN for 691643?
691643 is cataloged in the U.S. Government catalog under NSN 3120-00-342-6664. 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.