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<blockquote data-quote="oexing" data-source="post: 170932" data-attributes="member: 1493"><p>Forget those Löwenherz funny things, never been relevant anywhere, just polemics here. Same with certain factory standards like on Douglases possibly. In real life most metric fasteners were compatible throughout Europe since twenties I´d say when you picked same pitch and diameter fasteners, not a lot of different variations there. Hexagons were changed at some times for common sizes, like 14 mm heads to 13 mm in fifties. But BMW had in twenties 12 mm bolt heads but 13 mm nuts for their 8 mm fasteners and 15mm bolt heads with 17 mm nuts for the 10 mm fasteners, fine threads here. But then, they came from aero production so a bit special with them. My remark about change in ISO sizes was meant about 17 mm heads gone for 16 mm and 19 mm heads now 18 mm , a few deades ago, maybe just 30 years. But you will buy mostly the old sizes 17 and 19 mm from stores and possibly for many decades still. So no argument - and no problem either way. You can use your old collection of spanners no different, sizes are clearly forged in spanners as sizes of hexagons, unlike spanners with funny imperial thread standards so you still don´t know the real size of the hexagon . Anyway, a grotesque way to design standards and just 5 percent of mankind are stuck to this to their own disadvantage.</p><p></p><p> Vic</p></blockquote><p></p>
[QUOTE="oexing, post: 170932, member: 1493"] Forget those Löwenherz funny things, never been relevant anywhere, just polemics here. Same with certain factory standards like on Douglases possibly. In real life most metric fasteners were compatible throughout Europe since twenties I´d say when you picked same pitch and diameter fasteners, not a lot of different variations there. Hexagons were changed at some times for common sizes, like 14 mm heads to 13 mm in fifties. But BMW had in twenties 12 mm bolt heads but 13 mm nuts for their 8 mm fasteners and 15mm bolt heads with 17 mm nuts for the 10 mm fasteners, fine threads here. But then, they came from aero production so a bit special with them. My remark about change in ISO sizes was meant about 17 mm heads gone for 16 mm and 19 mm heads now 18 mm , a few deades ago, maybe just 30 years. But you will buy mostly the old sizes 17 and 19 mm from stores and possibly for many decades still. So no argument - and no problem either way. You can use your old collection of spanners no different, sizes are clearly forged in spanners as sizes of hexagons, unlike spanners with funny imperial thread standards so you still don´t know the real size of the hexagon . Anyway, a grotesque way to design standards and just 5 percent of mankind are stuck to this to their own disadvantage. Vic [/QUOTE]
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