Timken - Aircraft Bearing Cup | A4138-20629 NeedsPricing Long-flight comfort: Super-soft padded headband

Long-flight comfort: Super-soft padded headband and undercut Comfort-Gel ear seals reduce pressure points

David Clark M-7/DC Electret Noise-Cancelling Microphone | 09168P-31

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Timken - Aircraft Bearing Cup | A4138-20629 NeedsPricing Long-flight comfort: Super-soft padded headbandThis is the most basic and most widely used type of tapered roller bearing. It consists of two main separable parts: the cone (inner ring) assembly and the cup (outer ring). It is typically mounted in opposing pairs on a shaft. Specifications Series: A4000 Cup Part Number: A4138 Design Units: Imperial Approvals: FAA PMA Don't be tempted to buy cheapy automotive bearingsBecause Timken uses the same base part number for both the automotive and aviation