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Author Topic: DTS reader mounting screws - what size thread? Stephen Furley Film God Posts: 3059 From: Coulsdon, Croydon, England Registered: May 2002 posted 09-15-2013 06:00 AM                     That is the thread for the screws to attach the reader head to the mounting bracket? I can't find anything that fits it. Is it a UNC thread? Also, what are the socket head screws, seem to be 3/8" of some sort, used to attach an American style reel arm to the top of a Century projector?  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 09-15-2013 01:42 PM                     The DTS reader uses 10-24 screws And yes, American projectors use 3/8" thread on the upper reel arms and 5/16" on the lower.  |  IP: Logged Stephen Furley Film God Posts: 3059 From: Coulsdon, Croydon, England Registered: May 2002 posted 09-15-2013 03:01 PM                     Thank you Steve; they're not very common over here but I've found a source for them in small packs.  |  IP: Logged Ron Yost Master Film Handler Posts: 344 From: Paso Robles, CA Registered: Aug 2003 posted 09-26-2013 02:33 PM                     FYI: The 3/8s are 3/8-16 (16 threads-per-inch), or 'coarse' thread. There's a good chart on UNF screw threads, taps, etc. here: UNF screw chart  |  IP: Logged Stephen Furley Film God Posts: 3059 From: Coulsdon, Croydon, England Registered: May 2002 posted 09-27-2013 02:33 AM                     I think they're basically similar to our old BSW Whitworth and BSF threads, but with a 60 degree angle thread form rather than 55 degrees. Whitworth threads still show up in odd places, tripod mounting screws for cameras are 1/4 or 3/8 inch Whitworth for example, but almost all normal things are metric here now, and have been for a long time. That table brings back horrible memories of the old letter and number size drills; it's all so much easier in metric. UNC are obtainable here, but are not very widely used. I've managed to get the ones I need.  |  IP: Logged

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