Slow poke me replaced a rear shock , rear bumper support bracket bolts and re-painted the rear muffler hanger. I purchased 2 new rear top shock mount bolts, the long bumper support bracket bolts and a bolt for the rear muffler hanger. These were all difficult to ease out. All the replacements had a smaller bolt head making me thing subsequent removal/replacement will be even more difficult. Flange bolts - does that mean they kind of have a built in washer to spread the load, those flanges were smaller diameter also. Has there been some new standard that allows this , like a DIN standard? I've kind of learned some of the bolt terminology like thread pitch and length but maybe not on the size of that flange. I'd like to abandon this volvo trend and order bolts to be duplicates of what the late 1994 stuff that is on my car.