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440259 ✓ Verified by PartsTable
— · COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The DIAPHRAGM,CHAMBER,BRAKE is a the manufacturer industrial component. Key specifications include material: RUBBER POLYISOPRENE NATURAL CLASS NR, diaphragm_type: BEADED ANGULAR RECESSED, overall_height: 1.250 INCHES NOMINAL IN, mounting_method: BEAD, material_thickness: 0.130 INCHES NOMINAL IN, environmental_protection: OIL RESISTANT. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 2530-00-430-2392, 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
440259
NSN: 2530-00-430-2392
FSC: 2530
CAGE: 02280 — AMERICAN HOIST AND DERRICK CO
SPECIFICATIONS
materialRUBBER POLYISOPRENE NATURAL CLASS NR
diaphragm_typeBEADED ANGULAR RECESSED
overall_height1.250 INCHES NOMINAL IN
mounting_methodBEAD
material_thickness0.130 INCHES NOMINAL IN
environmental_protectionOIL RESISTANT
overall_outside_diameter5.500 INCHES NOMINAL IN
NSN2530-00-430-2392
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available DIAPHRAGM,CHAMBER,BRAKE TITLE COMPONENT PN 440259 MFR DIAPHRAGM,CHAMBER,BRAK
KEY FEATURES
•
DIAPHRAGM TYPE: BEADED ANGULAR RECESSED
•
ENVIRONMENTAL PROTECTION: OIL RESISTANT
•
OVERALL OUTSIDE DIAMETER: 5.500 INCHES NOMINAL IN
•
MOUNTING METHOD: BEAD
•
MATERIAL THICKNESS: 0.130 INCHES NOMINAL IN
•
MATERIAL: RUBBER POLYISOPRENE NATURAL CLASS NR
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL HEIGHT1.250 INCHES NOMINAL IN
DIAPHRAGM TYPEBEADED ANGULAR RECESSED
ENVIRONMENTAL PROTECTIONOIL RESISTANT
OVERALL OUTSIDE DIAMETER5.500 INCHES NOMINAL IN
MOUNTING METHODBEAD
MATERIAL THICKNESS0.130 INCHES NOMINAL IN
MATERIALRUBBER POLYISOPRENE NATURAL CLASS NR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 27
18120Interchangeable
interchangeable cross-reference
interchangeable
M328Interchangeable
interchangeable cross-reference
interchangeable
FORENTA 18120Interchangeable
interchangeable cross-reference
interchangeable
6501-2Interchangeable
interchangeable cross-reference
interchangeable
C215351-2Interchangeable
interchangeable cross-reference
interchangeable
CH277Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 440259?
440259 is a DIAPHRAGM,CHAMBER,BRAKE.
What parts can replace 440259?
There are 27 known substitutes for 440259: 18120, M328, FORENTA 18120 and 24 more. Substitute compatibility should be verified for your specific system.
Is 440259 still available?
440259 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026