an automotive bolt has a designation of 1/2-13 UNC. auto technician A says this bolt is a course thread bolt. technician B says the bolt has a diameter of 13 millimeters so which one is correct ,if either is correct?
2006-12-09 13:55:10 · 10 answers · asked by doug f 1 in Cars & Transportation ➔ Maintenance & Repairs
Tech A is right and the diameter is .500 inch. 13 refers to the amount of threads per inch.
2006-12-09 13:58:26 · answer #1 · answered by gdwrnch40 6 · 1⤊ 0⤋
A bolt with a designation of 1/2 - 13 UNC means this bolt has 13 threads per inch, which is a very course thread. The clue is in the letter following the bolt size. NC standing for national course and NF standing for national fine.
2006-12-10 13:01:57 · answer #2 · answered by Anonymous · 0⤊ 0⤋
in some cases, a standard bolt and a metric bolt will thread onto the same nut, but one will be a little sloppy/loose on the nut. anyway, the simple solution is to go to the hardware store and try a standard 1/2"-13 thread per inch bolt, and try a 13 mm metric bolt. most hardware stores will have a thread checker. it is a little set of indexed teeth that fit into the threads on a bolt to determine the threads per inch. i guess the simple answer based on what you asked is this 1/2-13 means it is standard bolt, 1/2" diameter with 13 threads per inch. the -13 means tpi, NOT mm.
hope this helps
2006-12-09 23:02:32 · answer #3 · answered by forjj 5 · 0⤊ 0⤋
No, you're not.
Seems to me it's a 1/2" diameter bolt with 13 threads per inch (in length). That sure couldn't be considered a FINE thread.
I'd go with Technician A. Sounds like something from an ASE test. Your supposed to select the BEST answer, so I'd go with that.
2006-12-09 22:03:29 · answer #4 · answered by Squiggy 7 · 1⤊ 0⤋
1/2 - 13 unc = 1/2" dia. x 13 threads per inch united national coarse.
13 millimeters = 0.510" which 0.010" larger than 0.500" = 1/2" thus a 1/2 " unc nut would not fit. Conclusion, tech a is correct
2006-12-09 23:17:06 · answer #5 · answered by tronary 7 · 1⤊ 0⤋
1/2 inch equals 13 millimeters - your bad
2006-12-09 22:04:10 · answer #6 · answered by Anonymous · 0⤊ 1⤋
hey doug, man you wife was great, she sure liked my ***. im going to your moms house next
2006-12-10 23:15:52 · answer #7 · answered by Anonymous · 0⤊ 0⤋
im pritty sure that its A. much luck
2006-12-09 22:03:35 · answer #8 · answered by icantdothisanymore 1 · 0⤊ 0⤋
your not an idiot your a wacko , who cares........
2006-12-09 22:02:55 · answer #9 · answered by trip 2 · 0⤊ 1⤋
wtf that was confusing =)
2006-12-09 21:57:15 · answer #10 · answered by Anonymous · 0⤊ 1⤋