I have a feeling that it is standard Whitworth form. I would need to measure one to make sure though. I bet someone knows it off hand. Alan ----- Original Message ----- From: "Chris Crosskey" <chris.crosskey@xxxxxxxxx> To: <modeleng@xxxxxxxxxxxxx> Sent: Tuesday, February 14, 2006 11:26 AM Subject: [modeleng] Autolock thread specs Hi folks, Does anyone know what the thread specs are for autolock cutters?..... I might have to turn a plain-shank into a threaded in the near future.... Is it 20tpi 20(rings a bell)... the cutter is 3/8" 20BTW.. . Thanks chrisc ________________________________________________________________________ This=20e-mail,=20and=20any=20attachment,=20is=20confidential.=20If=20you=20= have=20received=20it=20in=20error,=20do=20not=20use=20or=20disclose=20the=20= information=20in=20any=20way,=20notify=20me=20immediately,=20and=20please=20= delete=20it=20from=20your=20system. ________________________________________________________________________ MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line. -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 267.15.6/257 - Release Date: 10/02/2006 MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.