Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW
The CUSHION,EAR is a the manufacturer industrial component. Key specifications include material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR, body_style: EARPHONE CUSHION, CIRCULAR, hardness_rating: 70.0 SHORE DUROMETER A NOMINAL, outside_diameter: 3.637 INCHES NOMINAL IN, center_hole_diameter: 3.344 INCHES MINIMUM AND 3.374 INCHES MAXIMUM IN, cross-sectional_height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-285-9785, 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.
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FREQUENTLY ASKED QUESTIONS
What is SP321?
SP321 is a CUSHION,EAR.
What parts can replace SP321?
There are 22 known substitutes for SP321: 85967-4LP, 900341-001, 85967-4 and 19 more. Substitute compatibility should be verified for your specific system.
Is SP321 still available?
SP321 is currently cancelled.
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