B28-20-5-5-8 — CAPACITOR,VARIABLE,GLASS DIELECT

✓ Government record, cited

— · BALL BEARING

PRODUCT OVERVIEW

B28-20-5-5-8: CAPACITOR,VARIABLE,GLASS DIELECT.

CAPACITOR,VARIABLE,GLASS DIELECT. Key specifications include material: COPPER ALLOY OVERALL, corner_shape: SQUARE ALL CORNERS, hole_diameter: 0.1250 INCHES NOMINAL FIRST IN, overall_length: 5.6250 INCHES NOMINAL IN, style_designator: SOLID, PLAIN, NO OUTSIDE FLANGES, body_inside_diameter: 3.0020 INCHES MINIMUM AND 3.0050 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 3120-00-427-1774, 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

B28-20-5-5-8

NSN: 3120-00-427-1774
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 51501 — ROGERS BROTHERS CORP (USA)

SPECIFICATIONS

material	COPPER ALLOY OVERALL
corner_shape	SQUARE ALL CORNERS
hole_diameter	0.1250 INCHES NOMINAL FIRST IN
overall_length	5.6250 INCHES NOMINAL IN
style_designator	SOLID, PLAIN, NO OUTSIDE FLANGES
body_inside_diameter	3.0020 INCHES MINIMUM AND 3.0050 INCHES MAXIMUM IN
body_outside_diameter	3.3750 INCHES MINIMUM AND 3.3800 INCHES MAXIMUM IN
lubricant_accommodation_style	GROOVED CIRCULAR
surface_groove_location_and_quantity	1 INTERNAL
antirotation/lubrication_type_and_quantity	4 HOLE
NSN	3120-00-427-1774

COMPONENT DIAGRAM

KEY FEATURES

•

CORNER SHAPE: SQUARE ALL CORNERS

•

BODY OUTSIDE DIAMETER: 3.3750 INCHES MINIMUM AND 3.3800 INCHES MAXIMUM IN

•

STYLE DESIGNATOR: SOLID, PLAIN, NO OUTSIDE FLANGES

•

BODY INSIDE DIAMETER: 3.0020 INCHES MINIMUM AND 3.0050 INCHES MAXIMUM IN

•

LUBRICANT ACCOMMODATION STYLE: GROOVED CIRCULAR

•

ANTIROTATION/LUBRICATION TYPE AND QUANTITY: 4 HOLE

•

MATERIAL: COPPER ALLOY OVERALL

TYPICAL APPLICATIONS

RAID cache protection during power loss events
Write-back cache enablement for storage controllers
Enterprise server data integrity assurance
Hot-swap battery/capacitor replacement in production

TECHNICAL CHARACTERISTICS

CORNER SHAPE	SQUARE ALL CORNERS
BODY OUTSIDE DIAMETER	3.3750 INCHES MINIMUM AND 3.3800 INCHES MAXIMUM IN
STYLE DESIGNATOR	SOLID, PLAIN, NO OUTSIDE FLANGES
OVERALL LENGTH	5.6250 INCHES NOMINAL IN
BODY INSIDE DIAMETER	3.0020 INCHES MINIMUM AND 3.0050 INCHES MAXIMUM IN
LUBRICANT ACCOMMODATION STYLE	GROOVED CIRCULAR
ANTIROTATION/LUBRICATION TYPE AND QUANTITY	4 HOLE
MATERIAL	COPPER ALLOY OVERALL
SURFACE GROOVE LOCATION AND QUANTITY	1 INTERNAL
HOLE DIAMETER	0.1250 INCHES NOMINAL FIRST IN

SUBSTITUTES & CROSS-REFERENCES 3

R645Reference document

Same NSN cross-reference

Reference document — Secondary reference

565013Reference document

Same NSN cross-reference

Reference document — Secondary reference

P1569Reference document

Same NSN cross-reference

Reference document — Secondary reference

LIFECYCLE

NSN statusCancelled· U.S. Government catalog

No demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is B28-20-5-5-8?

B28-20-5-5-8 is a CAPACITOR,VARIABLE,GLASS DIELECT.

What parts can replace B28-20-5-5-8?

There are 3 known substitutes for B28-20-5-5-8: R645, 565013, P1569. Substitute compatibility should be verified for your specific system.

What is the NSN for B28-20-5-5-8?

B28-20-5-5-8 is cataloged in the U.S. Government catalog under NSN 3120-00-427-1774. This indicates validated use in U.S. government and defense supply chains.

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