John, Thanks for that. It is just the information I needed. Does anyone know if these dimensions are standard? Is there, perhaps, any Federation (north or south) recommendation? alan@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx www.alanstepney.info Model Engineering, Steam Engine, and Railway technical pages. ----- Original Message ----- From: "John Pagett" <john.pagett@xxxxxxxxxx> To: <modeleng@xxxxxxxxxxxxx> Sent: Tuesday, November 23, 2004 10:51 PM Subject: [modeleng] Re: Couplings and projects Gents, Couplings at Bromsgrove SME are "standardised" in that everyone makes (or should) an adaptor bar which has two 6mm clearance holes 20mm apart and is less than 1/8" thick. 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.