1 Measurement of fasteners/bolts Fri Aug 23, 2013 1:55 pm
jjefferies
Life time member
Terribly minor question but when bolts/fasteners are called out in parts such as
"FILLISTER-HEAD SCREW - M8X45"
Am I correct that this 8mm (diameter) by 45 millimeters long and the length measurement includes the head as well as the shank? Is there a special designation for very short headed bolts? And is there an assumption of the quality such as grade 8?
And is there a major bias for the Fillister-head (allen socket) type bolt over the more prosaic hex headed bolt on BMW's. And why I'm noticing this sort of thing this morning is most likely due to lack of sleep. But I also note that the 7mm bolts used to hold the clutch housing together are called out as "screw" in Max-BMW's micro-fiche rather than giving their measurement.
"FILLISTER-HEAD SCREW - M8X45"
Am I correct that this 8mm (diameter) by 45 millimeters long and the length measurement includes the head as well as the shank? Is there a special designation for very short headed bolts? And is there an assumption of the quality such as grade 8?
And is there a major bias for the Fillister-head (allen socket) type bolt over the more prosaic hex headed bolt on BMW's. And why I'm noticing this sort of thing this morning is most likely due to lack of sleep. But I also note that the 7mm bolts used to hold the clutch housing together are called out as "screw" in Max-BMW's micro-fiche rather than giving their measurement.