Machine Design
Turn buckle has

No threads
Right hand threads on bout ends
Left hand threads on one end and right hand threads on other end
Left hand threads on both ends

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Machine Design
Tapered roller bearings can take

Axial load only
Both radial and axial loads and the ratio of these being greater than unity
Both radial and axial loads and the ratio of these being less than unity
Radial load only

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Machine Design
A bolt

Is provided with pointed threads
Has a head on one end and a nut fitted to the other
Has head at one end and other end fits into a tapped hole in the other part to be joined
Has both the ends threaded

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