A Left Or Right Handed Thread

[Wester]

How can you tell if a thread is left handed or right handed ? and are most threads right handed

 

[ianrauk]

if it tightens up when rotating clock wise, that's a right handed thread. Anti-Clockwise is a left handed thread.

 

[mcshroom]

Right handed thread the lines across are higher at the right hand side of the screw than the left, and of course vice versa for left hand thread.

(LHT on left, RHT on right)

The only left hand thread I can think of on a bike is the left pedal.

 

[Rickshaw Phil]

Right handed thread the lines across are higher at the right hand side of the screw than the left, and of course vice versa for left hand thread.

(LHT on left, RHT on right)

The only left hand thread I can think of on a bike is the left pedal.

Don't forget the right (drive side) bottom bracket cup.

 

[smokeysmoo]

Righty tighty, lefty loosey Except the exclusions mentioned above

 

[Scilly Suffolk]

Don't forget the right (drive side) bottom bracket cup.

Only if it's English.

 

[Rickshaw Phil]

Only if it's English.

Or more specifically, unless it's either French or Italian. See here for full details.

 

[02GF74]

...... as ^^^^ said, and also on some pedals, the small nut that holds the pdeal onto the spindle, can never remember which side it is though.

 

[Alien8]

...and the lock-ring on your fixed.