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photo:camera_mounts [2016/12/19 15:25] (current)
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 +===== Camera screw thread =====
 +Screw thread standard for most consumer cameras is 1/4-20 UNC ((http://​en.wikipedia.org/​wiki/​Unified_Thread_Standard)) (1/4 inch nominal diameter, 20 threads per inch). For most larger professional cameras it is 3/8-16 UNC. Earlier on the BSW ((http://​en.wikipedia.org/​wiki/​British_Standard_Whitworth)) thread profile was used, but they are similar enough to allow interconnection between the two.(([[http://​en.wikipedia.org/​w/​index.php?​title=Tripod_(photography)]]))
 +If you live in Europe you might have problems finding taps and dies of this thread size. If you search for e.g. "tap 1/​4-20"​ or "die 1/​4-20"​ on [[http://​ebay.com|eBay]] you will get some hits, and that might be your cheapest option unless they are available in your local tool shop.
 +If you haven'​t used taps or dies for cutting new threads before you might want to read this rather old but useful [[http://​sheldonbrown.com/​tooltips/​taps.html|Tool Tips--Taps]] article. ​
 +1/4 inches (6.35 mm) is the major diameter. According to UNC the preferred drill bit for a tap size 1/​4-20"​ is #7 (0.201 inches, 5.105 mm).
 +//Dear fellow Americans, Englishmen and like minded people, it would make life so much easier for all of us if you moved on to the [[http://​en.wikipedia.org/​wiki/​International_System_of_Units|International System of Units (SI)]] :-)//