Somewhere I heard that Acme threads seize up to make breaking loose a vise difficult. i.e. vise was not a good application. Anyone have experience w/ that? dan tull georgia abba, afc, S.C. psba, obg,sofa ----- Original Message ----- From: "Michael Horgan" <[email protected]> To: <[email protected]> Sent: Wednesday, December 10, 2003 11:12 PM Subject: Re: [TheForge] Nuts > Ought to make nice vice screws, Dave.