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UNC= American Standard (unified course thread)

It is a bolt that has 13 threads per inch. which would be a 1/2 in in diameter bolt which has a unc of 13

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What fullform of UNC nut and bolt?

UNC stands for "UNIFIED BOLT THREAD COARSE" UNF stands for " UNIFIED BOLT THREAD FINE"


An automotive bolt has a designation of ½-13 UNC Auto Technician A says this bolt is a coarse-thread?

He is right. A fine thread would be 1/2-20.


An automotive bolt has a designation of half inch 13 UNC auto technician A say htis bolt is coare thread bolt auto technician B say the bolt has a diameter of 13 millimeters what sta?

A, the half inch bolt has 13 rows of thread in one inch.


An automotive bolt has a designation of ½-13 unc auto technician a says this bolt is a coarse-thread bolt auto technician b says the bolt has a diameter of 13 millimeters?

general use coarse thread bolt is correct. 1/2 inch bolt. 13 threads per inch.


An automotive bolt has a designation of 12-13 unc auto technician a says the bolt is a coarse thread bolt auto technician b says the bolt has a diameter of 13millimeters which of the statements is co?

The first technician is correct, it is a coarse thread. I'm not sure there is a bolt called 12-13 so I am assuming you meant 1/2 - 13. Wich would be a bolt 1/2 inches long. The diameter of a #13 unc bolt would be ( 13 x .013in ) + .06 = .229 inches in diameter.


Can you use unc screws in apart that has unf threads?

No. The coarse thread UNC screws will not thread into the fine thread UNF holes. UNC must be used with UNC and UNF with UNF.


What does UNC mean?

University of North Carolina Unified National Coarse (Thread forming)


WHAT IS 24 UNF THREAD PLUG GAUGE?

A thread gauge is a tool used for identifying the particular thread on a bolt or screw. The gauge will have several blades with saw like teeth of different sizes. You match a particular gauge to the thread which will then tell you what size thread it is. gauges come in various pitches to match different screw threads. UNF, UNC, Whitworth, Metric etc. Each has a different pitch angle and thread per inch or millimetre.An image of a thread gauge can be seen HERE


What size drill bit should you use to drill a hole that is threaded for a 1by4-20 UNC bolt?

Your meaning is not clear. - If you are going to tap the threads in, use a 7/32 drill bit. If you want a hole that this bolt will slip through, use a 9/32 drill bit.


What thread is the bolt that holds the harmonic balancer to the crankshaft on a 350 chev?

It is a standered fine thread bolt, Grade 8


Is the Tensioner Arm bolt on a 99 mustang a reverse thread bolt?

No it is not. The bolt on the pulley is but the tensioner mounting bolt is a T55 torx bit head with the standard thread (right/tight left/loose).


What is the definition of a unf thread size?

Unified National Fine as opposed to UNC - Unified National Course