tap sizes...... again

[BURN]

I need the drill bit sizes for a 3-56 and 4-40 taps (they need to make a chart for this stuff). I need the drill sizes for the taps and the clearance sizes for the threads and the heads.

If any knows where there is a chart for this sort of thing, it sure would be handy. Thanks in advance for your help.

 

[Mike G]

I don't have a chart handy, but you can get one at just about any hardware store that sells taps & drills. Most drill index's come with a chart, or you can even contact an industrial supply house for one.

Mike

 

[L6steel]

.052" #55 0-80 UNF 3/64

.0595" #53 #1-64 UNC #1-72 UNF

.07 #2-64 UNF #2-56 UNC

076" #48 thru bit for 0-80

.0785" #47 #3-48 UNC
.081" #46 thru bit for 1-72
.082" #45 #3-56 UNF

.089" #43 #4-40 UNC thru bit for 2-56
.0935" #42 #4-48 UNF

thru bit for 3-56 is number 38
thru bit for a 4/40 screw is number 36

------------------
Take care!! Michael

Always think of your fellow knife makers as partners in the search for the perfect blade, not as people trying to compete with you and your work!
http://www.nebsnow.com/L6steel
Buzzards gotta eat, same as worms!!!

 

[butcher_block]

Tap drill size calculators

 

[Karl B. Andersen]

I have a chart hanging on each end of my shop.
And if you have Google - - just type in "drill tap chart".

 

[kuraki]

Google sucked in 2001.

 

[A.McPherson]

Lol! kuraki

So if you know of anywhere that sells Starrett tools, ask for one of their drill size posters. Most will have them and give em away... at least a pocket card sized one.

 

[Stacy E. Apelt - Bladesmith]

Lloyd, this may be a record ... a 17 year old thread answer.

 

[butcher_block]

wow no clue why it had popped in shoptalk jsut saw it was near the top didnt even look at the date looks liek i win this years necropost contest

 

[Stacy E. Apelt - Bladesmith]

 

[kuraki]

wow no clue why it had popped in shoptalk jsut saw it was near the top didnt even look at the date looks liek i win this years necropost contest

Probably you clicked sort by post date and didn't notice. BTDT.

 

[12345678910]

Lol! kuraki

So if you know of anywhere that sells Starrett tools, ask for one of their drill size posters. Most will have them and give em away... at least a pocket card sized one.

if you're in the USA, sign up to the starrett website, they will send you posters and toolbox cards