1644-A — CAPACITOR,VARIABLE,AIR DIELECTRI

✓ Government record, cited

— · HOSE FITTING

PRODUCT OVERVIEW

1644-A: CAPACITOR,VARIABLE,AIR DIELECTRI.

CAPACITOR,VARIABLE,AIR DIELECTRI. Key specifications include material: STEEL, construction: ONE-PIECE, hole_diameter: 0.406 INCHES NOMINAL IN, overall_width: 4.000 INCHES NOMINAL IN, style_designator: NON-CIRCULAR W/APERTURE, aperture_diameter: 2.531 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-203-6406, 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

1644-A

NSN: 4730-00-203-6406
NIINs: 002036406, 005827532, 006723509
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 78500 — MERITOR HEAVY VEHICLE SYSTEMS, LLC (USA)

SPECIFICATIONS

material	STEEL
construction	ONE-PIECE
hole_diameter	0.406 INCHES NOMINAL IN
overall_width	4.000 INCHES NOMINAL IN
style_designator	NON-CIRCULAR W/APERTURE
aperture_diameter	2.531 INCHES NOMINAL IN
bolt_hole_quantity	4
bolt_circle_diameter	3.250 INCHES NOMINAL IN
outside_corner_radius	0.375 INCHES NOMINAL IN
outside_corner_inverted_radius	0.375 INCHES NOMINAL IN
side_radius_from_gasket_center	1.625 INCHES NOMINAL IN
NSN	4730-00-203-6406

COMPONENT DIAGRAM

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

SUBSTITUTES & CROSS-REFERENCES 9

405004-001Reference document

Same NSN cross-reference

Reference document — Advisory reference — outside the item-of-supply concept

219-4Reference document

Same NSN cross-reference

Reference document — Secondary reference

6030099Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

JD7759Reference document

Same NSN cross-reference

Reference document — Secondary reference

P687Reference document

Same NSN cross-reference

Reference document — Advisory reference — outside the item-of-supply concept

PD38557Reference document

Same NSN cross-reference

Reference document — Advisory reference — outside the item-of-supply concept

LIFECYCLE

NSN statusCancelled· U.S. Government catalog

Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is 1644-A?

1644-A is a CAPACITOR,VARIABLE,AIR DIELECTRI.

What parts can replace 1644-A?

There are 9 known substitutes for 1644-A: 405004-001, 219-4, 6030099 and 6 more. Substitute compatibility should be verified for your specific system.

What is the NSN for 1644-A?

1644-A is cataloged in the U.S. Government catalog under NSN 4730-00-203-6406. This indicates validated use in U.S. government and defense supply chains.

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1644-A — CAPACITOR,VARIABLE,AIR DIELECTRI

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