| 摘要 |
A fastener for attaching a milling cutter body to an adaptor includes a head portion, a body portion and an undercut disposed between the head portion and the body portion. The head portion has a diameter greater than a diameter of the undercut and a thread root diameter. The diameter of the undercut is equal to or less than the thread root diameter to allow the fastener to freely rotate when the fastener is threaded completely through the milling cutter body. Once threaded completely threaded the milling cutter body, the fastener is threaded into the adaptor to securely attached the milling cutter body to the adaptor.
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