Joined: Feb 2012
Posts: 19,354
Likes: 5,472
From: Rochester, NY
Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Mongoose Tomac ATB, GT Bravado ATB, JCP Folder, Stewart 650B ATB
The keying is the square taper. A 90* indexed one. Easy to tell when the arms are not "straight" with each other. As far as retaining bolt/nut tightness the common tapered square is around 30 ft/lbs of torque. New fittings want a second/third follow up tightening after a hundred+ miles of riding. Andy