UNF Bolts
UNC Bolts
General questions
100

What does UNF stand for?


Unified National Fine. 
100

What does UNC stand for? 

Unified coarse threads. 

100

Which bolt is used to tap into thin-walled members? 

Fine thread.

200

What tool is needed to tighten a UNF bolt? 

A wrench or socket.

200

What is an advantage in using UNC thread bolts?

They are better for quick assembly and work well in softer materials

200

Which bolts is better used in soft materials. 

UNC thread bolts. 

300

What is the main advantage of using UNF bolts? 

They are stronger and are less likely to loosen. 

300

Are the stripping strengths greater or less than a Fine thread?

Less than 
300

Which bolts are stronger? 

Fine thread bolts. 

400

True or False. This bolt is known to cross thread LESS than the coarse thread bolts. 

FALSE.

400

Why would someone choose a coarse thread bolt over a fine thread bolt when working with delicate materials? 

Less likely to cross thread. 

400

Which bolts have more adjustment accuracy? 

Fine thread bolts. 

500

Why are UNF bolts better for high clamping force?

Finer threads provide stronger grip and better load distribution.

500

What is one of the most important benefits that a Coarse thread brings? 

a) Improved fatigue resistance.

b) They can tap better in thin-walled members.

c) they are more stable.  

a) Improved fatigue resistance.

500

How does the thread pitch of UNF bolts impact their ability to be used in small or compact spaces compared to UNC bolts?

 finer threads, can fit into smaller spaces, offering more flexibility in tight areas than UNC bolts.