The CUSHION,SEAT BACK,AIRCRAFT is a the manufacturer industrial component. Key specifications include diameter: 4.000 INCHES NOMINAL IN, material: GLASS OPTICAL LOCATION NOT OTHERWISE SPECIFIED, end_item_identification: OPTICAL TEST BENCH,P/N 2215260-001,NSN 4920-01-342-2932. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 1680-01-221-2677, 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.